Model No. 1680 Free Speed RPM 4500 Bolt Capacity (in.) 1 Square Drive (in.) 3/4 Impacts Per Minute Max. Torque (ft-lb) Weight (lbs.) Length (in) Air Cons. (CFM) 950 1200 12.6 8.9 8 Rec. Hose Size (in.) 1/2 Air Inlet (in.