1Even Force: The ratchet screw in the center of the car brake caliper creates an even force when compressing the piston to ensure proper alignment and prevent damage to the brake components. 2Flexible: The ratchet technology of this caliper tool provides a 360 degree swing that allows you to hold the compression plate in place as you return the lever handle to unfold or retract the plate. 3Ergonomic Design: This caliper piston tool with an extended reversal rod allows for easy change from unfold to retract. The padded handle provides a comfortable and effortless grip. 4Heavy Duty Material: Ratchet screws and pads are made of carbon steel for maximum strength and durability and are useful braking tools for replacing brake system parts in cars. 5Wide Application: The disc brake caliper compression tool works on single piston, dual piston and quad piston, as well as single and twin piston floating calipers.