FEATURES Two hammer design with Q.C. collect. Rear Exhaust. Forward/Reverse switch. Two stages push type trigger. Use for general automotive industries, electric or and assembly lines. Brand Name Zipp Air Tool USA Item model number ZID040P Hex. Drive 1/4" (6.4 mm) Bolt Size Capacity (6~8 mm) Free Speed 8000 rpm Max. Torque 36 ft-lb (49 nm) Operating Air Pressure 90psi (6.2bar) Avg. Air Consumption 4.6 cfm (130 l/min) Net Weight 2.2 lbs (1 kgs) Overall Length 7-13/16"(198 mm) Air Inlet Size 1/4 Inch