This is a replacement diamond abrasive wheel only for our original Piston Ring End Gap Filing Tool (Part No. 3131-01, manufactured by Speed Pro until 2013). The diamond abrasive cuts better and lasts longer than the original silica-based abrasive. Sold individually.
Note: Does not fit the current Piston Ring End Gap Filer, Part No. 3136-101. The current tool uses a thicker stone abrasive wheel.