Ratio：
A、HI Speed：1/15
B、Low Speed：1/64.25
BMP Ratio：
A、HI Speed：：1/15*15
B、Low Speed：1/64.25*15
OD：
A、gearhousing：42.5mm
B、Clutch：50mm
LD：62.75mm
Change speed mode：Lever Steel wire
Characteristic：
A、Can be used for brush and brushless electric drill
B、Can be select spindle locking function
C、Can withstand a large torque of 35 N / m
