AIR LATCH ARM 200 RPM 1/2 1.1 Kg 1/2" Ratchet Wrench model number. Free Speed (RPM) Torque (ft-lbs) Square Driver Weather entry (NPT) Hose Size ID inch (mm) Weather Consumption CFM (L/Min) Length inch (mm) Weight lbs (Kg) SM-31 200 50 1/2" 1/4" 3/8 (10) 4 (113) 10.4 (265) 2.5 (1.1) *Recommended Air Pressure at 90 PSI (6.2 Bar)