"Impact sockets are forged from high-quality chrome molybdenum alloy steel for durability and superior strength. Patented sidewall drive sockets apply force to the walls of the fastener instead of the points, resulting in longer fastener life. Laser-etched, hi-visibility markings allow for easy readability. Meets or exceeds ANSI and government torque performance specifications. Drive in. 3/8, Pieces qty. 8, Point Size qty. 6, Storage Type Blow-molded case, SAE Socket Size in. 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, Material Type Chrome molybdenum steel."