Square Drive: 1" or 25 mm Speed Without Load: 3600 RPM Max. Torque: 2300 feet (3100 Nm) Air Consumption: 36cfm (1019 L/Min). Anvil: 200 mm (8 in.) Ability 45mm (1-3/4") bolt size Air Hose:1/2" with Universal Connector; Air Inlet:1/2". Packaged by BMC