Expert Quality, ensures parallel piston retraction avoiding damage to the piston seals. For use on opposed fixed and single piston sliding calipers without wind-back mechanisms. Features and Benefits • Expert Quality • Ensures parallel piston retraction avoiding damage to the piston seals • For use on opposed fixed and single piston sliding calipers without wind-back mechanisms Contents 1 x Piston Retraction Tool, 1/2" Sq. Dr.