Specifications: Air Consumption - ft3/min: 18 Air Inlet Thread N.P.T. - in: 1/4 Average Air Consumption - m3/min: 0.50 Drilling Capacity - in: 5/16 Drilling Capacity - mm: 8 Free Speed - rpm: 2900 Noise Level - dB(A): 79 Nominal Chuck - in: 5/16 Nominal Chuck - mm: 8 Overall Length - in: 10 55/64 Overall Length - mm: 276 Type of Spindle: 3/8-24UNF Weight - lb: 3.34