Sunex Tools' 17-pc Pneumatic Brake Caliper Set, No. 3935, offers quick and efficient rewinding of left or right rear disc brake caliper pistons, with convenient one-hand operation. Mechanics gain full control of the caliper throughout the process, and the pressure assisted center shaft requires less turning force, making the wind-back process easier. A magnetic adapter base provides secure attachment and quick change of press pads. Adapters cover nearly every application in North America through 2008. Includes 16 adapters.