Tool includes self-locking lever attachment to prevent accidental start of motor (not shown in photo). Specifications: Air Consumption - ft3/min: 14.0 Air Inlet Thread N.P.T. - in: 1/4 Average Air Consumption - m3/min: 0.4 Collet Chuck Size - in: 1/4 Collet Chuck Size - mm: 6 Free Speed - rpm: 20000 Noise Level - dB(A): 73 Overall Length (approx) - in: 7 51/64 Overall Length (approx) - mm: 198 Rated Horse Power - w: 195 Weight - lb: 1.32