MasterCraft 054-1221-0 User manual

18 V COMPACT IMPACT DRIVER
054-1221-0
Owner’s Manual
PRODUCT SPECIFICATIONS
Battery:
18 V, 1.7 Ah Ni-Cd
Speed:
0–2,600 RPM (no load)
Impact speed:
0–3,200 BPM
Torque:
1,150 in/lbs (maximum)
Hex drive:
1/4" Quick release
Charger:
1 hour diagnostic, Class 2
Charger input:
120 V AC, 60 Hz
Charger output:
18 V DC, 2.2 A
Universal replacement charger:
054-3101-4 or 054-3103-0
Weight:
2 lb 12 oz (1.25 kg) without battery
Need Assistance?
Call us on our toll free customer support line:
1-800-689-9928
Technical questions
Replacement parts
Parts missing from package
Imported by Mastercraft Canada Toronto, Canada M4S 2B8
Patent Pending

2
Product specifications ………….…………………………………………………….
1
Table of contents ……………………………………………………………………...
2
General safety warnings ……………………………………………………………..
3–4
Eye, ear & lung protection ……………………………………………………………
3–4
Electrical safety ……………………………………………………………………….
4
Power tool safety ……………………………………………………………………...
5–6
General safety rules …………………………………………………………………..
5
Work area ………………………………………………………………….…………..
5
Electrical safety ……………………………………………………………………….
5
Personal safety ………………………………………………………………………..
5–6
Use and care of power tools .………………………………………………………..
6
Service …………………………………………………………………………………
6
Specific safety rules …………………………………………………………………..
7
Battery & charger safety ………………………………………………………….….
8–9
Battery pack recycling ………………………………………………………………..
9
Symbols ………………………………………………………………………………..
10
Know your impact driver ……………………………………………………………..
11
Accessories ……………………………………………………………………………
11
Contents ……………………………………………………………………………….
12
Assembly and operating ……………………………………………………………..
13–23
Charging the battery pack ……………………………………………………………
13
Charger LED functions ……………………………………………………………….
14
Installing the battery in the impact driver …………………………………………...
15
On-board screwdriver-bit storage …………………………………………………...
16
Installing driver bits and sockets ………..…………………………………………..
16
Forward/reverse switch ………………………………………………………………
17
Variable-speed trigger switch ………………………………………………………..
17
Tightening and removing fasteners …………………………………………………
18
Preparing screw holes ………………………………………………………………..
19
Driving screws …………………………………………………………………………
20–21
Installing nut drivers for 3/16" to 3/8" nuts ………………………………………….
21
Installing impact sockets for 7/16" to 3/4" nuts …………………………………….
22
Removing nuts ………………………………………………………………………...
22–23
Maintenance …………………………………………………………………………..
24–25
Exploded view …………………………………………………………………………
26
Parts list ………………………………………………………………………………..
27–28
Warranty ……………………………………………………………………….………
29–30
TABLE OF CONTENTS

3
EYE, EAR & LUNG PROTECTION
This instruction manual includes the following:
General Safety Rules
Specific Safety Rules and Symbols
Functional Description
Assembly
Operation
Maintenance
Accessories
!
ALWAYS WEAR EYE PROTECTION THAT CONFORMS WITH CSA
REQUIREMENTS or ANSI SAFETY STANDARD Z87.1
FLYING DEBRIS can cause permanent eye damage. Prescription
eyeglasses ARE NOT a replacement for proper eye protection.
WARNING: Non-compliant eyewear can cause serious injury if
broken during the operation of a power tool.
SAVE THESE INSTRUCTIONS FOR REFERENCE
WARNING: Use hearing protection, particularly during extended
periods of operation of the tool, or if the operation is noisy.
!
GENERAL SAFETY WARNINGS
CAUTION: Before using this tool or any of its accessories, read this
manual and follow all Safety Rules and Operating Instructions.
!

4
ELECTRICAL SAFETY
WARNING: To avoid electrical hazards, fire hazards or damage to the
tool, use proper circuit protection.
This tool is wired at the factory for 120 V operation. It must be connected to
a 120 V, 15 A circuit that is protected by a time-delayed fuse or circuit
breaker. To avoid shock or fire, replace power cord immediately if it is worn,
cut or damaged in any way.
GENERAL SAFETY WARNINGS
WEAR A DUST MASK THAT IS DESIGNED TO BE USED WHEN
OPERATING A POWER TOOL IN A DUSTY ENVIRONMENT.
WARNING: Dust that is created by power sanding, sawing, grinding,
drilling, and other construction activities may contain chemicals that are
known to cause cancer, birth defects, or other genetic abnormalities. These
chemicals include:
Lead from lead-based paints
Crystalline silica from bricks, cement, and other masonry products
Arsenic and chromium from chemically treated lumber
The level of risk from exposure to these chemicals varies, according to how
often this type of work is performed. In order to reduce exposure to these
chemicals, work in a well-ventilated area, and use approved safety
equipment, such as a dust mask that is specifically designed to filter out
microscopic particles.
!

5
GENERAL SAFETY RULES
WARNING: Read and understand
all instructions. Failure to follow all
instructions listed below may result in
electric shock, fire and/or serious personal
injury.
WORK AREA
Keep your work area clean and well lit.
Cluttered benches and dark areas invite
accidents.
Do not operate power tools in potentially
explosive environments, such as in the
presence of flammable liquids, gas or dust.
Power tools create sparks that may ignite
dust or fumes.
Keep bystanders, children and visitors
away while operating the tool. Distractions
can cause the operator to lose control.
ELECTRICAL SAFETY
Double insulated tools are equipped with a
polarized plug (one blade is wider than the
other). This plug will only fit into a
polarized plug one way.
If the plug does not fit into the outlet
properly, reverse the plug. If it still does not
fit, contact a qualified electrician to install a
polarized outlet. Do not alter the plug in
any way. Double insulation eliminates the
need for the three-pronged grounded
power cord and grounded power supply
system.
Avoid contact between the operator's body
and grounded surfaces such as pipes,
radiators, ranges, and refrigerators. There
is an increased risk of electric shock if the
operator's body is grounded.
Do not expose power tools to rain or wet
conditions. Water entering the power tool
will increase the risk of electric shock.
Do not abuse the cord. Do not use the
power cord to carry the tool or to pull the
plug out of the outlet. Keep the power cord
away from heat, oil, sharp edges, and
moving parts. Replace a damaged power
cord immediately. A damaged power cord
increases the risk of electric shock.
When operating a power tool outdoors,
use an outdoor-rated extension cord type
“W-A” or “W”. These cords are rated for
outdoor use and they reduce the risk of
electric shock.
PERSONAL SAFETY
Stay alert, be aware of the surroundings,
and use common sense when operating a
power tool. Do not use a power tool while
tired or under the influence of drugs,
alcohol, or medication. A moment of
inattention while operating a power tool
may result in serious personal injury.
Dress properly. Do not wear loose clothing
or jewellery.
Contain long hair. Keep hair, clothing, and
gloves away from moving parts. Loose
clothing, jewellery, or long hair can get
caught in moving parts.
!
POWER TOOL SAFETY

6
PERSONAL SAFETY –cont’d
Avoid accidental start-ups. Verify that the
switch is in the OFF position before
plugging in the tool. Carrying a power tool
with a finger on the switch or plugging in a
tool that has the switch in the ON position
invites accidents.
Remove adjusting keys and wrenches
before turning the tool ON. A wrench or
key that is left attached to a rotating part of
the tool may result in personal injury.
Do not overreach. Keep proper footing and
balance at all times. Proper footing and
balance allows the operator to maintain
better control of the tool in unexpected
situations.
Use safety equipment. Always wear eye
protection.
Use a dust mask, non-skid safety shoes, a
hardhat, or hearing protection when
appropriate.
USE AND CARE OF POWER TOOLS
Use clamps or another practical means to
secure and support the workpiece to a
stable platform. Holding the work in a hand
or against the body is not stable, and may
lead to loss of control.
Do not force the tool. Use the correct tool
for the application. The correct tool will do
the job better and safer when used at the
rate that it was designed to work at.
Do not use a power tool if it cannot be
turned ON or OFF using the power switch.
A tool that cannot be controlled using the
switch is dangerous, and must be repaired.
Disconnect the plug from the outlet before
making any adjustments, changing
accessories, or storing the tool. Such
preventive safety measures reduce the risk
of accidental start-ups.
When power tools are not in use, store
them out of the reach of children or
untrained persons. Tools are dangerous in
the hands of untrained users.
Maintain tools with care. Keep cutting tools
sharp and clean. Properly maintained
cutting tools with sharp cutting edges are
less likely to bind, and are easier to
control.
Inspect the tool for misalignment or binding
of moving parts, broken parts, and any
other condition that may affect the
operation of the tool. If it is damaged, have
the tool serviced before using it. Many
accidents are caused by poorly maintained
tools.
Use only accessories that are
recommended by the manufacturer for this
model. Accessories that are suitable for
one tool may become hazardous when
used with another tool.
SERVICE
Tools servicing must be performed by
qualified personnel. Service or
maintenance performed by non-qualified
personnel could result in a risk of injury.
When servicing a tool, use only identical
replacement parts. Follow the instructions
in the Maintenance section of this Manual.
The use of unauthorized parts or failure to
follow the instructions in the Maintenance
section of this Manual may create a risk of
electric shock or injury.
POWER TOOL SAFETY

7
WARNING: Know your compact
impact driver. Do not plug in the
charger or install the battery in the tool
until you have read and understand this
Instruction Manual. Learn the tool’s
applications and limitations, as well as
the specific potential hazards related to
this tool. Following this rule will reduce the
risk of electric shock, fire, or serious injury.
Always wear eye protection.
Any power tool can throw
foreign objects into your eyes
and cause permanent eye damage.
ALWAYS wear safety goggles (not
glasses) that comply with ANSI safety
standard Z87.1. Everyday glasses have
only impact resistant lenses. They ARE
NOT safety glasses.
WARNING: Glasses or goggles
not in compliance with ANSI Z87.1
could cause serious injury when they
break.
Always use hearing protection when
operating the impact driver.
Use only impact sockets and accessories
that are designed for use with an impact
driver. Do not use chrome plated sockets
and accessories. Chrome plated sockets
and accessories are designed for hand
use only and MUST NOT be used with an
impact driver. They may shatter and
possibly cause serious injury.
Before each use, check the impact sockets
and accessories for excessive wear or
cracks. Worn or damaged sockets or
accessories may shatter and possibly
cause serious injury. Worn accessories
may allow the socket to come off during
operation of the impact driver.
After installing any accessory in the hex
drive, pull outward on the accessory to
ensure it is properly installed and cannot
be pulled out of the hex drive.
Never use the impact driver as a torque
wrench. Always use a torque wrench to
adjust the fastener to the specified torque.
Keep the impact driver handle and body
clean and free of oil and grease. Always
use a clean dry cloth when cleaning. Do
not use solvents, brake fluid, gasoline or
other petroleum products to clean the tool.
They will damage the tool.
Do not wear neckties or loose clothing.
When wearing gloves, they must be tight
fitting and slip resistant type. Leather
gloves offer the best protection.
Always use two hands when operating the
impact driver. Use one hand on the handle
and the other on the front of the tool body.
Never place your hand so it is touching the
socket or accessory when the tool is
turned ON. Your hand could be seriously
injured.
Always remove the battery from the tool
before installing or removing any socket or
accessory.
Be ready for components to shift when
removing any fastener. The speed of the
fastener removal could cause unexpected
shifting of the components.
SPECIFIC SAFETY RULES
!
!

8
WARNING: Only use the 1 hour
diagnostic charger to charge the
Compact Mastercraft 18V Ni-Cd battery.
Charging any other batteries may
damage the charger and possibly cause
serious injury.
Do not store or carry the battery in a
manner in which metal objects could
contact the exposed metal end. Do not
place the battery in aprons, pockets,
drawers, etc. with loose nails, screws, keys
etc. The battery could short circuit causing
a fire, personal injury or damage to the
battery.
Never attempt to open the battery for any
reason. If the housing of the battery breaks
or cracks, immediately discontinue its use
and do not recharge.
Do not charge the battery if it is wet or
shows any evidence of corrosion.
A small leakage from the battery may
occur under extreme usage, during
charging or in extreme temperature
conditions. This does not indicate a failure.
However, if the outer seal is broken and
this leakage gets on your skin, follow these
steps:
1. Wash immediately with soap and
water.
2. Neutralize with a mild acid such as
lemon juice or vinegar.
3. If liquid gets into your eyes, flush
immediately with clean water for a
minimum of 10 minutes and seek
medical attention.
NOTE: The battery liquid is slightly acidic.
Do not incinerate the battery. It can
explode in a fire.
Do not use an extension cord. Plug the
charger cord directly into an electrical
outlet.
Use the charger only in a standard
120 V, 60 Hz electrical outlet.
Do not use the charger in wet or damp
conditions. It is intended for indoor use
only. Do not use the charger near sinks or
tubs. Do not immerse the charger in water.
Do not allow the cord to hang over the
edge of a table or counter or touch hot
surfaces. The charger should be placed
away from sinks and hot surfaces.
Do not use the charger to charge any
batteries other than the compact impact
driver batteries. Other batteries may
explode.
Do not operate the charger if cord or plug
is damaged. Replace the damaged cord
and plug immediately.
Do not operate the charger if it has
received a sharp blow, been dropped or
otherwise damaged in any way. Have a
qualified technician examine the charger
and repair it if necessary. Do not
disassemble the charger.
BATTERY & CHARGER SAFETY
!

9
Do NOT charge batteries when the work
area or the battery temperature is at or
below 0° C (32° F) or above
45° C (113° F).
Unplug the charger when not in use and
before cleaning or maintenance.
BATTERY PACK RECYCLING
To preserve our natural resources, please
recycle or dispose of batteries properly.
The batteries charged by this charger may
contain chemicals and metals that are
harmful to the environment. Never dispose
of re-chargeable batteries in your normal
household garbage or in landfill sites as
they will add to the pollution of the
environment.
Please return all defective rechargeable
battery packs to your local Canadian
Tire™ store for recycling. If you do not
have a Canadian Tire™ store in your area,
please call 1-800-822-8837 for the location
of your nearest RBRC battery recycling
location.
BATTERY & CHARGER SAFETY
NOTE: See Pages 24 & 25 for
detailed information concerning
preparation for recycling battery packs
and exercising a Ni-Cd battery pack
for peak performance.

10
V
Volts
A
Amperes
Hz
Hertz
W
Watts
kW
Kilowatts
Microfarads
L
Litres
kg
Kilograms
H
Hours
N/cm2
Newtons per square
centimetre
Pa
Pascals
Min
Minutes
S
Seconds
Alternating current
Three-phase alternating
current
Three-phase alternating
current with neutral
Direct current
No load speed
Alternating or direct
current
Class II construction
Splash-proof
construction
Watertight construction
Protective grounding at
grounding terminal,
Class I tools
Revolutions or
reciprocations per
minute
Diameter
Off position
Arrow
Warning symbol
SYMBOLS
WARNING: Some of the following symbols may appear on the impact
wrench. Study these symbols and learn their meaning. Proper interpretation
of these symbols will allow for more efficient and safer operation of this tool.
!
3042597
LISTED
This symbol designates that this tool is
listed with Canadian requirements by ETL
Testing Laboratories, Inc.
Conforms to UL Std. 60745-1, 60745-2-2.
Certified to CAN/CSA Std. C22.2 No.
60745-1, 60745-2-2.
JD506218

11
Quick release
hex drive
Variable speed
trigger switch
Forward/reverse
button
Screwdriver
bits
Battery release
button
Air vents
Battery
AVAILABLE ACCESSORIES
WARNING: Use only accessories
that are recommended for use with this
impact driver. Follow the instructions
that accompany the accessories. The
use of improper accessories may result
in injury to the operator or damage to
the cordless drill.
Before using any accessory, carefully read
the instructions or the owner’s manual for
the accessory.
Drill bits
Screwdriver bits
Nut drivers
WARNING: If any part is missing or
damaged, do not plug charger into the
power source or install the battery in the
tool until the missing or damaged part is
replaced.
KNOW YOUR IMPACT DRIVER
ACCESSORIES
!
!

12
CONTENTS
Carefully unpack the impact driver.
Compare the contents against the
“IMPACT DRIVER COMPONENTS” chart
at right.
NOTE: See illustration of impact driver
below.
WARNING: To avoid fire or toxic
reaction, never use gasoline, naphtha,
acetone, lacquer thinner or similar
highly volatile solvents to clean the
tool.
!
CONTENTS
IMPACT DRIVER COMPONENTS
KEY
DESCRIPTION
QTY
A
Impact driver
1
B
Screwdriver bits with
ANSI groove
●#2
●#2
1
1
C
1 hour LED diagnostic
charger
1
D
18 V Ni-Cd battery
2
Owner’s Manual
1
`

13
CHARGING THE BATTERY PACK
WARNING: Use only the 1 hour
diagnostic charger supplied with the
impact driver to charge the Mastercraft
18 V Ni-Cd battery supplied with the
tool. Charging any other batteries with
this charger may damage the charger,
and possibly cause serious injury.
1. To charge the battery, place the
charger (1) in a dry location near a
120 V, 60 Hz electrical outlet
(Fig. 1).
2. Place the battery stem (2) into the
matching cavity (3) in the top of the
charger.
NOTE: Make sure the battery is pressed
fully onto the charger as far as it will go.
3. Plug the battery charger into the
120 V, 60 Hz wall receptacle.
NOTE: Do NOT charge batteries when the
work area or the battery temperature is at
or below 0°C (32° F) or above
45°C (113° F).
When the battery charger is plugged into a
“live” receptacle, the battery charger will
begin charging the battery. The red LED
(4) and the green LED (5) on the top of the
charger will indicate the charging status
(Fig. 2).
ASSEMBLY AND OPERATING
!
Fig. 1
Fig. 2

14
CHARGER LED FUNCTIONS (Fig. 3)
Power ON
The green LED will stay ON when the
charger is plugged into a ”live” power
source.
Battery partially charged
The red LED will flash during charging.
Battery fully charged
When battery is approximately 100%
charged, the red LED will turn OFF and the
green LED will blink for about 1 minute
then stay continuously ON, indicating the
battery is fully charged. The blinking green
LED indicates the charger is in trickle
charge mode while completing the
charging cycle.
NOTE: You may use the battery as soon
as the green LED begins to flash, as the
battery will be at least 98% charged.
Defective battery
The red LED will stay ON when a defective
battery is detected and it should be
replaced.
NOTE: For additional help, call the
customer support toll free number
1-800-689-9928.
Too hot or too cold
Both the red LED and the green LED will
stay ON when the work area or battery
temperature is either too high or too low.
Remove the battery from the charger and
let it sit at room temperature 21° C (70° F)
for about one hour, and resume charging.
ASSEMBLY AND OPERATING
Red
light
Green
light
Function
—
---
---
—
—
—
Power
ON
Battery
charging
Trickle
charging
Defective
battery
Too hot or
too cold
Flashing
Flashing
ON
On
On
On
Fig. 3

15
INSTALLING A BATTERY IN THE
IMPACT DRIVER
1. Remove the discharged battery (1)
from the tool by pressing on one the
battery release buttons (2) on the
sides of the drill handle (3) (Fig. 4).
NOTE: There is one battery release button
on each side of the handle. It is only
necessary to press one of the buttons to
release the battery.
2. Pull the battery out of the tool handle.
3. Slide the fully charged battery into the
matching cavity in the tool handle
where the discharged battery has
been removed.
NOTE: Make sure the battery is fully
engaged with the mounting slots in the tool
handle. The battery release buttons will
“click” into place when the battery is fully
installed.
WARNING: Do not immerse battery
pack in water. Sudden cooling could cause
hot battery to explode or leak.
ON-BOARD SCREWDRIVER BIT
STORAGE
Convenient on-board screwdriver-bit
storage (1) is provided at the rear of the
housing (Fig. 5).
ASSEMBLY AND OPERATING
!
Fig. 4
Fig. 5

16
INSTALLING DRIVER BITS AND
SOCKETS
WARNING: Use only screwdriver
bits, sockets and accessories that are
designed for use with an impact driver.
Do not use chrome plated sockets and
accessories. Chrome plated sockets and
accessories are designed for hand use
only and MUST NOT be used with an
impact driver. They may shatter and
possibly cause serious injury.
WARNING: Always remove the
battery from the tool before changing any
sockets, bits or accessories. You may
injure your hand if the tool is started
accidentally.
1. To install a screwdriver bit, pull
outward on the hex drive sleeve (1)
(Fig. 6). While holding the hex drive
sleeve out, insert the bit (2) fully into
the hex drive and then release the
outer sleeve.
2. When the hex drive sleeve is
released, pull outward on the bit to
ensure the retaining ball inside the
hex drive is engaged with the groove
in the bit (3) to prevent the bit from
sliding out of the hex drive.
3. To remove the bit, pull outward on the
hex drive sleeve and pull the bit out of
the hex drive.
WARNING: Never use a screwdriver
bit or nut driver that does NOT have the
locking groove. These accessories will not
be adequately held in the hex drive and
could come loose and possibly injure the
operator.
ASSEMBLY AND OPERATION
!
!
!
Fig. 6

17
FORWARD/REVERSE SWITCH
This impact driver is equipped with a
forward/reverse button (1) (Fig. 7).
1. To operate the impact driver in the
forward direction, press the
forward/reverse button to the LEFT for
driving screws or tightening nuts.
2. To operate the impact driver in the
reverse direction, press the
forward/reverse button to the RIGHT
for removing screws or removing nuts.
NOTE: Never press the forward/reverse
button while the tool it turned ON. Damage
to the tool will result.
VARIABLE-SPEED TRIGGER SWITCH
This impact driver is equipped with a
variable-speed ON/OFF trigger switch.
1. To start impact driver, gently squeeze
the trigger switch (2) (Fig. 8).
NOTE: The impact driver will turn at its
slowest speed when the trigger switch is
depressed slightly. The impact driver will
turn at its fastest speed when the trigger
switch is fully depressed.
2. To stop the impact driver, release the
trigger switch.
NOTE: Operating the tool at a slow speed
for an extended period of time may cause
the motor or the battery pack to overheat.
If either the tool or the battery gets hot,
stop using the impact driver and allow the
overheated components to cool for at least
15 minutes.
ASSEMBLY AND OPERATION
Fig. 7
Fig. 8

18
TIGHTENING AND REMOVING
FASTENERS
The most common uses for the impact
driver are to drive or remove screws and to
tighten or loosen small nuts.
The principles for operating the impact
driver are the same for most applications.
For illustrative purposes, driving a wood
screw is shown.
ASSEMBLY AND OPERATION
!
For safety reasons, the operator
must read the sections of this
Owner’s Manual entitled “GENERAL
SAFETY WARNINGS”, “POWER
TOOL SAFETY”, “SPECIFIC SAFETY
RULES”, “BATTERY & CHARGER
SAFETY” and “SYMBOLS” before
using this impact driver.
Verify the following every time the
impact driver is used:
1. Safety glasses and hearing
protection being worn.
2. Socket, nut driver or screwdriver
bit is the correct size and is
“impact driver” rated.
3. Socket, nut driver or screwdriver
bit is in good condition.
Failure to observe these safety rules
will significantly increase the risk of
injury.
WARNING
!

19
PREPARING SCREW HOLES
It is important to prepare screw holes
before attempting to fasten two pieces of
wood together. Proper preparation will
make screws drive easier and prevent
misaligned components, stripped screw
heads, splitting and separating of wood
components.
1. Clamp the components that are to be
screwed together in their desired
position (Fig. 9).
2. Drill a pilot hole (1) through the outer
piece (2) and into the inner piece (3).
Drill the hole 2/3 the diameter of the
smooth portion of the screw shank.
NOTE: If the wood is soft, drill the hole 2/3
the length of the screw. If the wood is hard,
drill the hole the full length of the screw.
3. Remove the clamp from the two
pieces to be screwed together.
4. Enlarge the hole (1) in the outer piece
(2) so it is the same size as the
smooth portion of the screw shank
(Fig. 10).
5. If using a flat head screw, counter-sink
the hole (4) so the head of the screw
will be flush with the surface when
fully driven into place.
ASSEMBLY AND OPERATIONASSEMBLY AND OPERATION
Fig. 9
Fig. 10

20
DRIVING SCREWS
When driving screws, care must be taken
to use a bit that correctly fits the head of
the screw being driven. Be sure to use the
largest bit size that will properly fit into the
head of the screw. The bit must also be in
good condition and not worn so it will drive
screws without slipping out of the screw
head.
Always hold the impact driver with two
hands when driving and removing screws
to provide the best possible control over
the tool.
1. Select the correct screwdriver bit for
the screw being driven.
2. Insert the bit into the hex drive
(Fig. 6).
3. Set the forward/reverse button to the
LEFT for driving screws (Fig. 7).
4. Insert the screwdriver bit (1) fully into
the screw head (2) (Fig. 11).
5. While holding the screwdriver firmly
against the screw with both hands and
the bit aligned with the screw,
squeeze the trigger switch and drive
the screw.
6. When the screw is driven to the
correct depth, release the switch and
the impact driver will stop.
ASSEMBLY AND OPERATION
Fig. 11