1/2in square drive heavy duty ratchet wrench Features anti-slip head design which virtually eliminates slippage while reducing the potential for heat build up, even in long run downs, easy grip reverse for simple directional changes 1/4in NPTF air inlet Air consumption, average 15 cu.ft/min Driver size 1/2 " RoHS Compliant NA Speed, no load 150 rpm Torque range (Nm) 14-68 Weight 1.08 kg