Jet Tools impact sockets are made from SAE 4140 chrome molybdenum high impact steel for toughness and durability. Sockets made of the finest quality 4140 Chrome Molybdenum high impact steel. Meets or exceeds U.S. Federal Specs: GGG-W-660A and ANSI specifications. Latest advancements in manufacturing and heat treat provide unequaled strength and higher hardness without brittleness. Torque Drive technology engages the flats of the fastener to provide more torque while reducing fastener rounding. Hi-vis laser markings and additional hard stamp ensures permanent socket identification
