Features: 1. Part Number: 66785 66786 are replacement reference numbers for the manual piston ring grinder, please check before purchasing. 2. Function: To ensure proper piston ring clearance, the piston ring grinder can be used to file piston rings faster and more accurately. 3. Premium Material: Manual piston ring grinder is made of high-quality aluminum alloy, rust-proof, waterproof, solid and durable. 4. Easy to Use: Hold the piston ring on the pin and file the ring with a grinding wheel, shake the handle to ensure the piston ring clearance is correct. 5. Practical Repair Tool: Manual piston ring grinder with 120 grit carbide grinding wheel is perfect for piston repair. Specification: Item Type: Manual Piston Ring Grinder Material: Aluminum Alloy Function: 120 grit carbide grinding wheel Usage Method: Manual OE: 66785 66786 Function: To ensure proper piston ring clearance, the piston ring grinder can be used to file piston rings faster and more accurately. Package List: 1 x Manual Piston Ring Grinder Note: 1. Please double check the part number of your item, matching information is for reference only. 2. If you are unsure of the item, please contact us before buying to avoid unnecessary returns, thanks!