Optional Size: H8, H9, H10, H11, H12, H13, H14, H16, H17, H18, H19. Deepened sleeve, strong torque, high bite. Suitable for hexagon screw installation and removal. Used in pneumatic screwdrivers, electric screwdrivers, pneumatic drill, drill, pistol drills, screwdrivers and other hand on the installation of the hexagon tools for supporting.
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