Proto 6 Piece Universal Disc Brake Caliper Set Universal brake caliper tool set assists in the replacement of pads on most vehicles with 4-wheel disc brakes. Tool and adapters rotate brake pistons into calipers allowing clearance for newer, thicker brake pads. Five disc sizes to fit most domestic and foreign vehicles, covers most: Honda, Ford, GM, Jaguar, Mazda, Audi, Chrysler, Nissan, Toyota, VW and Subaru 4-wheel disc brake systems. Hex end threaded bolt pushes adapter into caliper; smooth operation with wrench or socket. Rugged blow-molded case.