To ensure proper piston ring end clearance, the piston ring filter enables users to file piston rings quickly and accurately.Put the piston ring firmly against the positioning pin and shake the handle to turn the grinding wheel.Engine Piston Ring Filer.Manual Operated Model, Can Be Bench or Vise Mounted.Specification:Product Name: Manual Piston Ring Filer ToolSize: 16cm x 6.7cm x 5cm/ 6.3inch x 2.64inch x 2inch (LXWXH)Manufacturer Part Number: 66785Part Number: 66785Colour: blackMaterial: metalPackage Contents:1 x Engine Piston Ring GrinderOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.