CTA Tools 2574 Low-Profile Metric Cap Socket - 36-Millimeters is a low-profile metric hex socket designed for removing and installing oil filter housings caps with cartridge-type filters. It is made from chrome vanadium steel with a black finish. This socket is for use on BMW, Ford, Mercedes, Mini, VW and Audi models with 3/8-inch square drive tools. Heavy-duty construction allows for strength and durability. Whether tuning up your '68 Corvette or changing the oil on a John Deere tractor, CTA can supply you with the tools needed to do the job.