This tool is designed for compressing and decompressing brake caliper pistons, essential when replacing brake pads on a car. It uses a ratcheting lever mechanism for controlled and precise piston expansion or compression. The tool is made from durable metal, resistant to heavy loads and corrosion. The pressing plates are made of carbon steel to prevent deformation. This tool significantly speeds up car maintenance, especially in the braking system, and is useful for both professional mechanics and car enthusiasts.