Superior Quality ? Premium grade heavy duty steel, manufactured using centrifugal casting for quality, durability, anti-deformation and anti-corrosion. High precision, high hardness and bright paint coated surface can prevent the tool from corrosion and rust to provide a much longer service life. Upgrade Design ? Used In conjunction with an existing piston ring compressor to install piston rings into anti-polishing cylinder liners. Removing and installing the piston ring with ease and quick to save your time and energy.