Comparison of products
Features and benefits P 2 / 5 
Model 6991D : 9.5mm (3/8") square drive type 
Model 6992D : 12.7mm (1/2") square drive type
The lightest weight in each class
 Model 6991D : 1.3 Kg (including any of battery 9122, 9134 or 9135)
 Model 6992D : 1.4 Kg (including any of battery 9122 or 9135)
9.5mm square drive 
for Mod. 6991D 
12.7mm square drive
for Mod. 6992D 
Magnesium alloyed 
hammer case.
Easily operateable variable 
speed control switch
Set plate (optional accessory) 
can be attached
for the battery without 
push button. High capacity battery 9135 with 3.0Ah
can be used.
Palm-fitly, Soft Grip
Newly designed D28 type motor
with the following features
 * more compact and light weight
 * Externally accessible brush
 * Replaceable armature
 * Effective cooling 
Push Button for Reversing
More compactly designed body
Refer to the comparisons listed 
below. 
Model No.
Specification
Square drive : mm ( " )
Manufacturer
No load speed : (min -1= rpm)
Blows per min : (min -1= bpm).
Equipped motor
Max. fastening torque (N.m)
Externally accessible brush
Overall length : mm
Net weight :Kg (lbs )
MAKITA
6991D 6909D 6907D
0 - 2,300 0 - 2,200 0 - 2,000
0 - 3,000 0 - 2,800 0 - 2,600
D28-15 D31- 16 RS750
100 88 69
Yes Yes No
168 (6-5/8) 170 (6-11/16) 185 (7-9/32)
1.3 (2.9) 1.4 (3.1) 1.3 (2.9)
9.5mm (3/8") square drive type models
9.5 (3/8) 9.5 (3/8) 9.5 (3/8)
Model No.
Specification
Square drive : mm ( " )
Manufacturer
No load speed : (min -1= rpm)
Blows per min : (min -1= bpm).
Equipped motor
Max. fastening torque (N.m)
Externally accessible brush
Overall length : mm ( " )
Net weight :Kg (lbs )
MAKITA
6992D Model A-1
0 - 2,300 0 - 2,200
0 - 3,000 0 - 2,900
D28-15
100 98
Yes Yes
176 (6-59/64) 181 (7-1/8)
1.4 (3.1) 1.6 (3.6)
12.7mm (1/2") square drive type models
12.7 (1/2) 12.7 (1/2)
Competitor A