Specifications: Model: URW-81R Air Consumption - ft3/min: 19.5 Air Inlet Thread N.P.T. - in: 1/4 Free Speed - rpm: 220 Max Hex Socket Size - in: 9/16 Max Hex Socket Size - mm: 15 Max. Torque - ft-lbs: 11.56 Max. Torque - Nm: 15.68 Overall Length (approx) - in: 11.9 Overall Length (approx) - mm: 300 Weight - lb: 4.0