3/8 square (C-Ring) driving shank for quick and easy socket changes Maximum standard bolt capacity M10 to M20, high strength bolt M10 to M16 300 Nm maximum fastening torque and 500 Nm nut busting torque Fastening control for a wide range of applications Variable speed controlled by trigger Electronic 4 speed impact power selection for max/hard/med/soft Forward/reverse rotation Auto-stop system and trigger switch with full speed mode Not compatible with G-Series batteries Please refer to the Instruction Manual for correct modes to be selected and sockets to be used for each individual application, Weight: 2.425084882 Pounds, Manufacturer: Makita