Features and Benefits: Black oxide finish and has etchings for identification; Design drives the side of the fastener instead of the corner; 6 points; Impact grade; Lifetime warranty does not cover abuse; The socket is designed to tackle the toughest jobs with solid durability and keeps them pounding job after job. The socket is forged from the finest chrome-molybdenum alloy steel, the best choice for strength. It also features a radius corner design extends the life of fasteners.