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 32mm oil filter socket. It is to be used on GM EcoTec and Saab engines. This socket is designed to tackle the toughest jobs with solid durability and keeps them pounding job after job.