Set Contains: OTC-7553 - Four wheel disc brake adapter tool Fits 1-1/2" pistons. Usable two ways: one side fits GM Honda Mitsubishi Mazda Dodge Conquest and Subaru; other side fits Ford Pontiac Fiero Subaru and Toyota. OTC-7554 - Four wheel disc brake adapter tool. Fits 1-11/16" pistons on Subaru Nissan Datsun and Ford Thunderbird. OTC-7555 - Four wheel disc brake adapter tool. Fits GM 1-7/8" pistons. OTC-7556 - Four wheel disc brake adapter tool. Fits GM 2-1/8" pistons. OTC-7557 - Four wheel disc brake adapter tool. Fits GM 2-1/2" pistons.