Specifications: Air Consumption - CFM: 8.8 Free Speed - rpm: 4100 Hex Drive - in: 1/4 Overall Length - in: 5.3 Sound Level - dB(A): 75 Torque Range - ft lbs: 4.1 - 8.9 Torque Range - Nm: 5.5 - 12 Weight - lb: 1.4 Model number ending in "D" come standard with 1/4" Hex quick-change chuck