Shindaiwa HomePro 22DH series User manual

22DH DOUBLE-SIDED
HEDGE TRIMMER
SHINDAIWA OWNER'S/
OPERATOR'S MANUAL
WARNING!
Minimize the risk of injury to yourself and others! Read this manual and
familiarize yourself with the contents. Always wear eye and hearing
protection when operating this unit.
Part Number 68126-94010 Revision 2/02

2
Introduction
The Shindaiwa 22DH series of hand
power tools has been designed and
built to deliver superior performance
and reliability without compromise to
quality, comfort, or durability.
Shindaiwa high performance
engines represent the leading edge of
2-cycle engine technology, delivering
exceptionally high power at remark-
able low displacement and weight. As
an owner/operator, you’ll soon
discover for yourself why Shindaiwa is
simply in a class by itself!
IMPORTANT!
The information contained in this
manual describes units available at
the time of publication.
While every attempt has been
made to give you the very latest
information about your Shindaiwa
product, there may be some differ-
ences between your 22DH series
machine and what is described here.
Shindaiwa Inc. reserves the right
to make changes to products without
prior notification, and without obliga-
tion to make alterations to units
previously manufactured.
WARNING!
The engine exhaust from this
product contains chemicals known
to the State of California to cause
cancer, birth defects or other
reproductive harm.
Introduction ......................................... 2
Attention Statements........................... 3
Safety Labels ........................................ 4
General Safety Instructions................ 5
Unit Description .................................. 8
Specifications ....................................... 9
Throttle Cable Adjustment............... 10
Mixing Fuel........................................ 11
Refueling ............................................ 11
Starting the Engine ........................... 12
Starting a Flooded Engine................ 14
Stopping the Engine.......................... 15
Idle Speed Adjustment...................... 15
Maintenance ...................................... 16
Muffler Maintenance ........................ 20
Cutter Blade Adjustment.................. 21
Long Term Storage ........................... 21
Troubleshooting Guide .................... 22
Emission System Warranty.............. 25
PAGE
Contents

3
Throughout this manual are special
“attention statements”.
WARNING!
A statement preceded by the
triangular attention symbol and the
word “WARNING” contains
information that should be acted
upon to prevent serious bodily
injury.
CAUTION!
A statement preceded by the word
“CAUTION” contains information
that should be acted upon to
prevent mechanical damage.
IMPORTANT!
A statement preceded by the word
“IMPORTANT” is one that possesses
special significance.
NOTE:
A statement preceded by the word
“NOTE” contains information that
is handy to know and may make
your job easier.
IMPORTANT!
The operational procedures de-
scribed in this manual are intended to
help you get the most from your
22DH hedge trimmer as well as to
protect you and others from harm.
These procedures are guidelines for
safe operation under most conditions,
and are not intended to replace any
safety rules and/or laws that may be
in force in your area. If you have
questions regarding your 22DH
hedge trimmer unit, or if you do not
understand something in this manual,
your Shindaiwa dealer will be glad to
assist you. You may also contact
Shindaiwa, Inc. at the address
printed on the back of this manual.
Attention Statements
Read and follow this Operator's
Manual. Failure to do so could
result in serious injury.
Always wear approved eye
and hearing protection at all
times during the operation of
this unit.
The blades are SHARP!
Handle with care.
Keep hands clear of the cutter
blades when starting the engine.
SAFETY

4
IMPORTANT!
Safety and Operation Information
Labels: Make sure all information
labels are undamaged and readable.
Immediately replace damaged or
missing information labels. New
labels are available from your local
authorized Shindaiwa dealer.
Safety Labels
Figure 1
SAFETY

5
SAFETY
Work Safely
Hedge trimmers operate at very high
speeds and can do serious damage or
injury if they are misused or abused.
Never allow a person without training or
instruction to operate your 22DH Hedge
Trimmer
WARNING!
Use Good Judgment
ALWAYS wear eye protection to
shield against thrown objects.
NEVER run the engine when
transporting the unit.
NEVER run the engine indoors!
Make sure there is always good
ventilation. Fumes from engine
exhaust can cause serious injury
or death.
ALWAYS clear your work area of
trash or hidden debris that could
be thrown back at you or toward a
bystander.
ALWAYS stop the unit immedi-
ately if it suddenly begins to
vibrate or shake. Inspect for
broken, missing or improperly
installed parts or cutters.
ALWAYS keep the unit as clean
as practical. Keep it free of loose
vegetation, mud, etc.
ALWAYS hold the unit firmly
with both hands when cutting or
trimming, and maintain control at
all times.
ALWAYS keep the handles clean.
ALWAYS disconnect the spark
plug wire before performing any
maintenance work.
NEVER use a cracked or broken
cutter or cutter bar; replace it
with a new or serviceable one.
NEVER attempt to adjust the
cutter with the engine running.
Stay Alert
You must be physically and mentally
fit to operate this unit safely.
General Safety Instructions
WARNING!
WARNING!
Never operate power equipment
of any kind if you are tired or if you
are under the influence of alcohol,
drugs, medication or any other
substance that could affect your
ability or judgement.
WARNING!
Minimize the Risk of Fire
NEVER smoke or light fires near
the hedge trimmer.
ALWAYS stop the engine and
allow it to cool before refueling.
Avoid overfilling and wipe off any
fuel that may have spilled.
ALWAYS move the unit to a place
well away from a fuel storage area
or other readily flammable
materials before starting the
engine.
NEVER place flammable material
close to the engine muffler.
NEVER run the engine without
the spark arrester screen in place.
Never make unauthorized
attachment installations. Never
use attachments not approved by
Shindaiwa for use on this unit.

6
22DH02
SAFETY
The Properly Equipped Operator
Always operate with both
hands firmly gripping the
unit.
Wear close-fitting clothing to
protect legs and arms.
Gloves offer added
protection and are strongly
recommended. Do not wear
clothing or jewelry that could
get caught in machinery or
underbrush.
Secure hair so it is
above shoulder
level. NEVER
wear shorts!
Always wear eye protection such
as goggles or safety glasses.
Wear appropriate footwear (non-skid boots or
shoes): do not wear open-toed shoes or sandals.
Never operate the unit while barefoot!
Keep a proper
footing and do not
overreach. Maintain
your balance at all
times during
operation.
Always make sure the cutters
are correctly adjusted and in
good condition.
Figure 2
Always wear hearing protection
such as earmuffs or earplugs.

7
22DH02
Be Aware of the Working Environment
Figure 3
Always keep proper footing and do not overreach.
Maintain your balance at all times during operation.
Avoid long-term
operation in very hot or
very cold weather.
Never operate this
unit if any safety
guards are missing or
damaged.
Make sure handgrips are free of foreign
substances such as lubricant and pitch.
Before moving to
another job site, stop
the engine and install
the blade cover.
Do not allow cutters to contact
buildings or other hard objects
during operation. If a cutter should
bind fast in a cut, stop the engine
immediately. Remove the cause of
the bind before proceeding.
Inspect the cutting site thoroughly prior to
operation. Remove objects that could get
entangled by the cutter blade. Note the
locations of fence posts and other fixed
objects and avoid cutting them.
Avoid cutting large or
extremely woody branches.
Doing so can shorten
cutter life, and damage the
gearcase.
Never cut metal objects
or wire with the blade.
SAFETY

8
Unit Description
Figure 4
Front Handle
Safety Guard
Gearcase
Guide Bar
Cutter
Fuel Cap
Ignition Switch
Throttle
Lever
Scabbard
Air Cleaner
Cover
Fuel Tank
Choke
Front
Handle
Rear
Handle
Recoil
Starter
Throttle Lock
Button
Throttle
Lockout
Lever
Using Figure 4 as a guide, familiarize
yourself with this unit and its various
components. Understanding this unit
helps ensure top performance, long
service life, and safer operation.
WARNING!
Do not make unauthorized
modifications or alterations to this
unit or to any of its components or
accessories.
IMPORTANT!
The terms “left,” “left-hand,” and “LH”;
“right,” “right-hand,” and “RH”; “front”
and “rear” refer to directions as
viewed by the operator during normal
operation of this product.
DESCRIPTION

9
DESCRIPTION
Specifications
Specifications subject to change without notice.
This hedge trimmer is supplied
fully assembled. Before proceed-
ing, inspect the unit to make sure
components are in place and that
fasteners are tight. Inspect for
broken, damaged or missing parts
or components.
Included with this unit should be:
䡵Owner's/Operator's manual.
䡵Tool set which includes a hex
wrench, screwdriver, and combina-
tion spark plug/13mm wrench.
䡵Blade scabbard.
Model....................................................................................................................22DH
Engine Model ..................................................................................................SDH220
Engine Type................................................. 2-cycle, horizontal cylinder, air cooled
Engine Bore x Stroke ......................................................................... 31mm x 28mm
Engine Displacement.......................................................................... 21.1cc/1.29 in3
Unit Weight (dry)................................................................................... 4.5kg/10.0 lb
Maximum Power ...............................................0.59kW/0.8 hp @ 7500 rpm (min-1)
Fuel/Oil Ratio .............................50:1 with Shindaiwa Premium 2-cycle mixing oil
Fuel Tank Capacity ...........................................................................0.4 liter/13.6 oz.
Carburetor.............................................Walbro WYL,diaphragm type, with primer
Ignition ........................................ One-piece, fully electronic, transistor controlled
Spark Plug .............................................................................................Champion CJ8
...................................................................For EMC compliance, use NGK BMR6A
Air Cleaner ...................................................................................................Foam type
Starting Method .........................................................................................Recoil type
Stopping Method......................................................... Slide switch, grounding type
Unit Dimensions.............(L x W x H) 985 x 240 x 214mm/38.8 x 9.4 x 8.4 inches
Blade Length.......................................................................................567mm/22.3 in.
Blade Type .................................Double-blade cutting action: double-edged blade
Clutch Type............................................................... 2-shoe, bonded with zinc body
Gear Type.................................................................................................... Spur gears
Gear Lube....................................................................................Lithium-base grease
EPA Emission Compliance Period*........................................................ Category B
*The EPA emission compliance period referred to on the emission compliance label located on the engine,
indicates the number of operating hours for which the engine has been shown to meet Federal emission
requirements. Category C = 50 hours (Moderate), B = 125 hours (Intermediate) and A = 300 hours (Extended)

10
22DH03
1. This hedge trimmer is supplied
fully assembled. To make sure the
unit operates correctly, check the
throttle lever:
—the throttle lever should operate
smoothly without binding.
—the throttle lever should have
about 1/4-inch (5-10mm) free play
when the engine is not running.
See Figure 5.
Throttle Cable Adjustment
Figure 5
1/4-in.
(5-10mm)
Free Play
Figure 6
Idle Throttle
Position Full
Throttle
Position
2. If free play adjustment is required,
loosen the two 10mm throttle cable
nuts at the throttle cable bracket.
3. Adjust the throttle cable nuts until
you achieve correct throttle free
play. See Figure 6.
4. When 1/4-inch (5-10mm) free play
is achieved, tighten the two 10mm
throttle cable nuts. When the
throttle cable is correctly adjusted,
and the throttle trigger is fully
depressed (full throttle position),
the throttle should contact the full
throttle stop. See Figure 7.
Figure 7
Throttle
Cable
Nuts
OPERATION
Full Throttle
Stop

11
Filling the Fuel TankMixing Fuel
CAUTION!
Some gasolines contain alcohol as
an oxygenate! Oxygenated fuels
may cause increased operating
temperatures. Under certain
conditions, alcohol-based fuels
may also reduce the lubricating
qualities of some mixing oils.
Never use any fuel containing
more than 10% alcohol by volume!
Generic oils and some outboard
motor oils may not be intended for
use in high-performance air cooled
2-cycle engines, and should never
be used in your Shindaiwa engine!
CAUTION!
This engine is designed to operate
on a 50:1 mixture consisting of
unleaded gasoline and a Premium
2-cycle mixing oil only. Use of
Non-approved mixing oils can lead
to excessive maintenance costs
and/or engine damage.
■Use only fresh, clean unleaded
gasoline with a pump octane rating
of 87 or higher.
■Mix gasoline with 50:1 Shindaiwa
Premium 2-cycle mixing oil or with
an equivalent high quality 2-cycle
mixing oil.
Example of 50:1 mixing quantites:
■1 gallon of gasoline to 2.6 oz.
mixing oil.
■5 litres of gasoline to 100 ml.
mixing oil.
IMPORTANT!
Mix only enough fuel for your immedi-
ate needs! If fuel must be stored
longer than 30 days and Shindaiwa
One oil with fuel stabilizer is not
used, it should first be treated with a
fuel stabilizer such as StaBil™.
WARNING!
Minimize the risk of fire!
■Stop the engine before refuel-
ing.
■Always allow the unit to cool
before refueling!
■Wipe all spilled fuel and move
the unit at least 10 feet (3
meters) from the fueling point
before restarting!
■Never smoke or light any fires
near the unit or fuels!
■Never place any flammable
material near the engine
muffler!
■Never operate the engine
without the muffler and spark
arrester in place and properly
functioning!
■Never operate this hedge
trimmer if fuel system compo-
nents are damaged or are
leaking!
OPERATION
1. Place the hedge trimmer on a flat,
level surface.
2. Clear any dirt or other debris from
around the fuel filler cap.
3. Remove the fuel cap, fill the fuel
tank with clean, fresh fuel mixture.
4. Install and firmly tighten the fuel
cap.

12
22DH05
Starting The Engine
IMPORTANT!
Engine ignition is controlled by a two-
position switch mounted on the
throttle body labeled “I” for ON or
START and “O” for OFF or STOP.
Control Positions
1. Move the ignition switch rearward
to the START position.
See Figure 8.
2. Set the throttle lever to the “fast
idle” position by performing the
following: See Figure 9.
a. Depress and hold the throttle lockout
lever, then squeeze the throttle lever.
b. Depress and hold the throttle lock
button.
c. While depressing the throttle lock
button, release the throttle lockout
lever and throttle lever.
3. Prime the carburetor by depressing
the carburetor primer bulb 4 or 5
times until you see clear fuel
flowing through the transparent
primer bulb. See Figure 10.
Ignition
Switch
Throttle
Lever
Throttle
Lockout
Lever
Throttle Lock
Button
WARNING!
KEEP CLEAR OF THE CUTTERS
DURING STARTING OPERA-
TIONS! THE CUTTERS MAY
MOVE WHEN THE ENGINE IS
STARTED!
■Place the hedge trimmer on the
ground during all starting
operations.
■Make sure you have a secure
footing, and keep a firm grip on
the unit as well.
■Keep all bystanders and pets
well clear of the hedge trimmer
during starting operations.
START
Position
Primer Bulb (viewed
from behind)
Figure 8
Figure 9
Figure 10
IMPORTANT!
The primer system only pushes fuel
through the carburetor. Repeatedly
pressing the primer bulb will not flood
the engine with fuel.
OPERATION

13
5. Place the machine on the ground.
Grip the engine cover with your left
hand and the starter handle with
your right hand. See Figure 12.
6. Pull the starter handle slowly
toward you until you feel the starter
mechanism engage.
7. Start the trimmer by pulling the
starting handle rapidly outward.
Choke
Open
Figure 12
Choke
Closed
Figure 11
4. (Cold Engine Only)
Move the choke lever forward to
the “closed” position to choke the
engine. See Figure 11.
Figure 13
When the engine starts or fires–
WARNING!
The cutting attachment will move
when the engine accelerates!
CAUTION!
Do not pull the recoil starter to the
end of the rope travel. Pulling the
recoil starter to the end of the rope
travel can damage the starter.
8. Open the choke by moving the
choke lever backward toward the
fuel tank, if it isn't open already.
See Figure 13.
9. If the engine does not continue to
run, repeat the appropriate starting
procedures for a cold or warm
engine.
10.When the engine starts, clear
excess fuel from the combustion
chamber by accelerating the engine
several times with the throttle
lever.
11.Operating the throttle will automati-
cally disengage the fast idle setting.
If the engine does not start–
■Repeat the appropriate starting
procedure for a cold or warm
engine.
■If the engine still fails to start, use
the procedures for “Starting a
Flooded Engine,” (next page).
OPERATION
Starting The Engine (cont.)

14
Starting a Flooded Engine
Spark
Plug
Spark
Plug
Lead
1. Disconnect the spark plug lead,
then use the spark plug wrench to
remove the spark plug (counter-
clockwise to remove).
See Figure 14. 3. Set the ignition switch to the STOP
position and open the choke. See
Figure 15. Fully depress the
throttle lever with your left hand
and pull the starter handle rapidly
with your right hand several times
to clear excess fuel from the engine
combustion chamber.
Figure 14
Choke
Open
Figure 15
22DH06
STOP
Position
2. If the spark plug is fouled or is
soaked with fuel, clean or replace
the plug as necessary. For spark
plug specifications and gapping
procedure, see page 18.
CAUTION!
Incorrect spark plug installation
can result in serious engine
damage!
4. Replace the spark plug and tighten
it firmly with the spark plug
wrench. If a torque wrench is
available, torque the spark plug to
148-165 inch-lbs (170-190 kg-cm).
5. Repeat the starting procedures for
a warm engine.
6. If the engine still fails to start or
fire, refer to the troubleshooting
chart at the end of this manual.
WARNING!
Move the ignition switch forward to
the STOP position.
OPERATION

15
The engine must return to idle speed
whenever the throttle lever is re-
leased. Idle speed is adjustable, and
must be set low enough to permit the
engine clutch to disengage the
cutters.
Idle Speed Adjustment
WARNING!
The cutters must NEVER oscillate
at engine idle speeds! If the idle
speed cannot be adjusted by the
procedure described here, return
the trimmer to your Shindaiwa
dealer for inspection.
1. Place the unit on the ground, then
start the engine, and then allow it to
idle 2–3 minutes until warm.
2. If the cutters oscillate when the
engine is at idle, reduce idle speed
by turning the idle adjustment
screw counterclockwise. See
Figure 17.
3. If a tachometer is available, the
engine idle speed should be final-
adjusted to 3,000 (±250) rpm
(min-1).
Adjusting Engine Idle
Idle
Adjustment
Screw
Figure 17
Stopping the Engine
22DH06
Ignition
Switch
Ignition
OFF
1. Cool the engine by allowing it to
idle for 2–3 minutes.
2. Move the ignition switch forward to
the STOP position. See Figure 16.
Figure 16
WARNING!
The cutters can continue oscillat-
ing after the engine is switched off.
OPERATION
Carburetor fuel mixture adjustments
are preset at the factory and cannot be
serviced in the field.
NOTE:

16
General Maintenance
IMPORTANT!
MAINTENANCE, REPLACEMENT
OR REPAIR OF EMISSION CON-
TROL DEVICES AND SYSTEMS
MAY BE PERFORMED BY ANY
REPAIR ESTABLISHMENT OR
INDIVIDUAL; HOWEVER, WAR-
RANTY REPAIRS MUST BE PER-
FORMED BY A DEALER OR SER-
VICE CENTER AUTHORIZED BY
SHINDAIWA KOGYO CO., LTD. THE
USE OF PARTS THAT ARE NOT
EQUIVALENT IN PERFORMANCE
AND DURABILITY TO AUTHO-
RIZED PARTS MAY IMPAIR THE
EFFECTIVENESS OF THE EMIS-
SION CONTROL SYSTEM AND MAY
HAVE A BEARING ON THE OUT-
COME OF A WARRANTY CLAIM.
WARNING!
Before performing any mainte-
nance, repair or cleaning work on
the UNIT, make sure the engine
and cutting attachment are
completely stopped. Disconnect
the spark plug wire before per-
forming service or maintnenance
work.
WARNING!
Non-standard parts may not
operate properly with your unit and
may cause damage and lead to
personal injury.
NOTE:
Using non-standard replacement parts
could invalidate your Shindaiwa
warranty.
MAINTENANCE

17
MAINTENANCE
22DH07
Daily Maintenance
Prior to each work day, perform the
following:
WARNING!
To reduce fire hazard, keep the
engine and muffler free of debris,
leaves, or excessive grease.
■Lubricate the cutters with oil before
use, and after refueling.
See Figure 18.
■Check the cutters for damage or
improper adjustment, and adjust or
replace as necessary.
See page 21.
■Carefully remove any accumulations
of dirt or debris from the muffler and
fuel tank. Dirt build-up in these areas
can lead to engine overheating, fire,
or premature wear. See Figure 19.
■Clean any debris or dirt from the
hedge trimmer cutter blades.
Lubricate the blades before use and
after refueling. Check the cutters for
damage or incorrect adjustment.
■Check for loose or missing screws or
components. Make sure the cutter
attachment is securely fastened.
■Check the entire unit for leaking
fuel or grease.
Keep intake
clean
Figure 19
Keep cooling
fins clean
Muffler
This unit must never be operated with
a faulty or missing spark arrester or
muffler. Make sure the muffler is well
secured and in good condition. A worn
or damaged muffler is a fire hazard
and may also cause hearing loss.
Spark Plug
Keep the spark plug and wire connec-
tions tight and clean.
Fasteners
Make sure nuts, bolts, and screws
(except carburetor adjusting screws)
are tight.
Clean debris from
tank and muffler
Clean around
spark plug Lubricate
cutters
Check cutters for
damage/correct
adjustment
Inspect/clean air
filter element
Figure 18
Inspect cooling fins, and
clean as required
22DH08

18
22DH09
Air Cleaner
Element
Air Cleaner
Cover
Figure 20
10-15 Hour Maintenance
CAUTION!
Do not operate the unit if the air
cleaner or element is damaged, or
if the element is wet.
Every 10 hours of operation,
(more frequently in dusty or
dirty conditions):
Remove the air cleaner element from
the air cleaner housing and clean it
thoroughly with soap and water. Rinse
and dry thoroughly. Add a few drops
of oil and work it in, then reassemble.
See Figure 20.
CAUTION!
Before removing the spark plug,
clean the area around the plug to
prevent dirt and debris from
getting into the engine’s internal
parts.
Every 10 to 15 hours
of operation:
■Remove and clean the spark plug.
See Figure 21. Adjust the spark
plug electrode gap to 0.024-inch
(0.6 mm). If the plug must be
replaced, use only:
–For EPA version: Champion CJ8
–For EMC version (electromagnetic
compatibility, required in Australia):
NGK BMR6A or an equivalent
spark plug of the correct heat
range.
22DH10
Figure 21
Clean the spark plug and check the
gap at the electrode.
0.024 inch
(0.6 mm)
MAINTENANCE

19
MAINTENANCE
Gearcase Lubrication Schedule
CAUTION!
Over-lubricating may cause the
gearcase to run slower than
normal, and may also cause
leakage from excess grease.
Every 20 Hours
Connect a grease gun to the grease
fitting on the left side of the gearcase.
Top off the gearcase grease level by
adding a high quality lithium-based
grease. Three pumps of the grease
gun handle should be adequate. See
Figure 22. DO NOT OVERFILL THE
GEARCASE!
Every 50 Hours
(or before long-term storage)
Remove the gearcase cover. Use
solvent and a soft brush to remove all
old grease from the gearcase. See
Figure 23. To refill, hand-pack the
gearcase with approximately 40–50
grams of high quality lithium-based
grease (50–70% of capacity). DO NOT
OVERFILL!
VIEWED FROM
THE BOTTOM
VIEWED FROM
THE BOTTOM
Gearcase
Grease Fitting
Gearcase Cover Socket-head
Capscrews
DO NOT
REMOVE
CONRODS!
Figure 22
Figure 23

20
22DH-03
Seasonally (or whenever you
experience hard starting or poor
performance):
WARNING!
Never operate this machine with a
damaged or missing muffler or
spark arrester! Operating with
missing or damaged exhaust
components is a fire hazard, and
may also damage your hearing.
■Hard starting or a gradual loss of
performance can be caused by
carbon deposits lodged in the
muffler’s spark arrester screen.
Remove the screen from the
muffler with the point of a small
pliers. See Figure 25. Thoroughly
clean the screen with a stiff bristle
brush. A damaged or otherwise
unserviceable screen must be
replaced. Reinstall by gently
tapping the screen in place.
Muffler
Arrester Screen
Figure 25
Filter Element
Hooked
Wire
Figure 24
50-Hour Maintenance
Every 50 hours of operation
(more frequently in dusty or dirty
conditions):
Muffler Maintenance
■If carbon accumulations in the
muffler or cylinder are severe or if
you do not notice an improvement
in performance after servicing,
return the trimmer to your
Shindaiwa dealer for inspection.
■Use a hooked wire to extract the
fuel filter from inside the fuel tank.
See Figure 24. Inspect the fuel filter
element. If it shows signs of
contamination from debris, replace
it with a genuine Shindaiwa
replacement fuel filter element.
Before reinstalling the filter,
inspect the fuel line. If you discover
damage or deterioration, the unit
should be removed from service
until it can be inspected by a
Shindaiwa-trained service techni-
cian.
MAINTENANCE
CAUTION!
Make sure you do not pierce the
fuel line with the end of the
hooked wire. The line is delicate
and can be damaged easily.