Sturdy air grinder rotor set crafted from sturdy and bakelite materials, designed for long lasting with minimal wear to your pneumatic tools' cylinders. Specifically engineered for 5 inch pneumatic sanders, these accuracy rotor deliver fast rotation speeds while maintaining cool operations during extended grinding projects. The yellow rotor (35x20x15mm) and brown bakelite (22x9mm) form a perfect matching for efficient materials removal in various power tool applications. Ideal replacement parts for pneumatic grinders and air die grinders, offering smooth operations and easy maintenance for your workshop equipment. Suitable with multiple pneumatic tool systems, this rotor set ensures efficient for professional grinding and sanding tasks.