Specification Square drive (inch): 1" Capacity Bolt Size (mm): M36 Free Speed (rpm): 4200rpm Max Torque (Nm ft-lb): 3100Nm 228416ft-lbs Overall Length (mm): 310mm Air Hose (I. D): 1/2" Air Inlet (PT): 1/2" Air Consumption (cfm L/min): 10cfm 285L/min Net Weight (lbs/kgs): 16.5lbs 7.5kgs