66785 manual piston ring Filer with 120 Grit 66786 grinding wheel To ensure proper piston ring end clearance, the piston ring filter allows users to assemble piston rings quickly and accurately. Place the piston ring firmly on the positioning pin and shake the handle to rotate the grinding wheel. Filer.Manually operated engine piston ring, can be bench or vise mounted. Specification:Product Name: Hand Piston Ring Filter ToolSize: 16cm x 6.7cm x 5cm/ 6.3inch x 2.64inch x 2inch (LxWxH)Manufacturer Part Number: 66785Part Number: 66785Color: BlackMaterial: MetalPackage Content:1 x Grinder Motor Piston RingOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.