Model No. 1680-6 Free Speed RPM 4500 Bolt Capacity (in.) 1 Square Drive (in.) 3/4 Impacts Per Minute Max. Torque (ft-lb) Weight (lbs.) Length (in) 950 1200 14.9 14.9 Air Cons. Rec. Hose (CFM) Size (in.) 8 1/2 Air Inlet (in.