Wide application - Includes 1 small engine valve lug tool attachment and 5 suction cup adapters for use with automotive, motorcycle, ATV and small engine valves Main function - The valve grinding tool corrects surface irregularities and eliminates damage on the surface of new valves so they fit properly into the valve guide - Built to meet original standard specifications and adheres to factory quality control How to use - Apply a thin layer of engine valve lapping paste (not included) around the valve - Install the valve in the valve guide - Press the appropriately sized suction cup tool firmly on the valve head - Slowly turn the lapping tool with a drill (not included) until the finish is appropriate Working speed and compatibility - The valve lapping tool attachment operates from 1000 rpm to a maximum of 1250 rpm - Direction can change automatically; inserting the valve is easy - Use with fine abrasive paste (not included) Use scenarios - Automotive valve servicing: recondition intake and exhaust valves during engine maintenance or rebuilds to ensure precise fit into valve guides - Motorcycle valve care: refurbish small engine valves on motorcycles to restore proper seating and performance - ATV and small engine service: maintain or rebuild valves in ATVs, lawn equipment, generators and other small gas engines, ensuring correct valve guide fit Notes - Paste for lapping and fine abrasive paste are not included - Includes 1 valve lug tool attachment and 5 suction cup adapters for versatile valve work