Caliper Piston Retractor tool kit screws brake caliper pistons back into their bores to make room for new brake pads. An essential tool for working on calipers with threaded pistons, the kit comes with a right-hand thread screw jack, press plate, and nine different diameter press disks to fit a wide variety of vehicles, both import and domestic, including Audi, BMW, MINI, Ford, GM, Honda, Mazda, Mitsubishi, Subaru, Toyota, Volkswagen and others.