This Air Ratchet Wrench with a 1/2\" square drive is ideal for the professional workshop The Sealey SA616 Air Ratchet Wrench has a free speed of 450rpm, faster than traditional ratchets. It has an operating pressure of 90psi with a built-in torque regulator adjustment and an enclosed ratchet head for added strength. This also allows for high torque reaching up to 75lb.ft (102Nm). Features: Manufactured with a composite covered handle to help reduce chill and vibration The patented reactionless drive mechanism, which stops the handle from snapping away when tightening bolts prevents wrist injuries The enclosed ratchet head gives added strength and allows for high torque reaching up to 75lb.ft (102Nm) Free speed of 450rpm, faster than traditional ratchets The driveshaft is housed by a heat-treated alloy steel bushing to reduce wear and extend the life Built-in torque regulator adjustment Push down twist reverse switch Suitable for the professional workshop Specification:  Drive: 1/2\" Sq  Maximum Torque: 75lb.ft(102Nm)  Free Speed: 450rpm  Air Consumption: 2.5cfm  Operating Pressure: 90psi  Air Inlet Size: 1/4\"BSP  Length: 285mm  Weight: 1.4kg  Noise Power/Pressure: 106.45/95.45dB(A)  Vibration/Uncertainty: 12.86/1.77m/s_