PS1912 SAE 6-Point Socket Set, 19 Pcs, Impact, 1/2" Drive Size, DeepThe sockets are made of the finest quality S. A. E. 4140 Chrome Molybdenum high impact steel Torque Drive socket design contacts the fastener on the sides instead of the corners, reducing fastener rounding and allowing up to 20% more torque Chamfered edges allow easiest socket placement on fastener, increasing productivity and reducing frustration Extra long deep sockets ensure maximum accessibility Encased in a blow mould case with removable lid