Features and Benefits: Forged from the finest chrome molybdenum alloy steel, the best choice for strength; Radius corner design extends the life of fasteners, design drives the side of the fastener instead of the corner; Design also avoids rounding of rusted or damaged fasteners; Socket is black oxide finish and has etchings for identification; This is a standard Impact Socket and is 7/16 in. It is 3/8 in. drive and 6 point. This socket is designed to tackle the toughest jobs with solid durability and keeps them pounding job after job.