The Milwaukee Hexagon Impact Socket 1/2in Drive gives best fitting thanks to 6 gripping points. Made of Chrome-Molybdenum steel - high quality alloy steel which provides ultimate strength and durability. The recessed corners allow torque to be transferred across the flats of the socket rather than producing stress on the points or corners. Thin wall construction provides access to tight spaces. Deep wall construction provides clearance for protruding bolts. Laser etched size markings for easy identification and won't wear off.