AG112A Attack Driver Rubber Grip Handle 6pc 1/2"Dr Includes #2-3 Ph 9-11mm Flat Bits & Holder

Special heat treatment is applied on the body
Hardness of striking part is slightly softer to prevent cracks
On the other hand, cam part converts the striking power to twisted by striking with a hammer, therefore this part is finished with higher hardness to improve anti-wear
Stronger spring is adapted to convert the striking power efficiently to twisting power