General description This 3/4""D brake caliper wrench is specifically designed for releasing and refitting brake caliper mounting bolts on commercial vehicles. It features a robust design with two impact striking faces, making it ideal for loosening bolts that are tightened to very high torque figures. Technical specifications Size: 21mm single hex (6pt) Material: S45C steel Hardness: HRC 38-42 Finish: Black phosphate Compatibility and accessories Use with 3/4""D torque wrench Other sizes available: 22mm (7340), 24mm (7341), 26mm (7342), 27mm (7343), and 30mm (8537) Installation When using in combination with a torque wrench, always apply the correction factor formula etched on the wrench.