Essential tool for retracting brake piston to allow insertion of new brake pads. For use on opposed-fixed and single-piston sliding calipers. Ensures parallel piston retraction, avoiding damage to piston seals. Also suitable for most ATE, Bendix, Delco and Girling calipers. Jaw capacity 88mm. Can be used with a 21mm spanner or 1/2″ square drive.