Specifications: Air Consumption - ft3/min: 14 Air Inlet Thread N.P.T. - in: 1/4 Average Air Consumption - m3/min: 0.40 Drilling Capacity - in: 5/16 Drilling Capacity - mm: 8 Free Speed - rpm: 2200 Noise Level - dB(A): 72 Nominal Chuck - in: 5/16 Nominal Chuck - mm: 8 Overall Length - in: 5 1/2 Overall Length - mm: 140 Type of Spindle: 3/8-24UNF Weight - lb: 1.98