The bits are made from industrial S2 steel

Sensor Type: Snap-In

Lug Nut Extractor Punch (28406)

Power/weight ratio: 86

GP 1/2" Torque Limiting Extensions (80 & 140 ft-lb) Torque Limit:140 ft/lb The bits are made fromGrey Pneumatic torque limiting extensions provide fast, repeatable wheel nut torque for passenger cars and light trucks when used with impact tools. Engineered for accuracy and durability, each extension is color coded by torque rating and designed for use with Grey Pneumatic thin wall impact sockets. Features: Preset torque control helps prevent over tightening Designed for use with impact wrenches Color coded for quick torque identification