1/2" Air Impact Wrench Square Drive: 1/2"(12.7mm) Bolt Capacity: 5/8"(16mm) Net Weight: 5.25lbs(2.38kgs) Length: 7-9/16"(192mm) Avg. Air Cons.: 3.5cfm(100l/min) Air Inlet: 1/4" Hose Size: 3/8"(9.5mm) Air Pressure: 90psi(6.3kg/cm2) Max. Torque: 435ft-lbs(590Nm) Free Speed: 7000r.P.M