1Function: A ratchet screw located in the center creates even force as it compresses the piston to ensure proper alignment and prevent damage to the brake components. 2Effort Saving: A 360 degree swing design makes the brake caliper compression tool easy to insert into the caliper and use from any direction. 3Premium Material and Slipproof Handle: The plate is made of carbon steel, which has high hardness and is not easy to deform. Cushion lever handle is easy to grip and antislip. 4How to Use: Because of the ratchet mechanism, you will need to apply some pressure to squeeze the diffuser inward, then you are able to diffuse the braking tool to fit your caliper. 5Application: The pressing tool comes with a set of large presses and a set of small presses and is suitable for most large trucks and commercial vehicles with one side, two side and four side piston brake clamps.