3" 77mm in diameter Arbor Size: 11mm Diamond grit for hard-material cutting applications For on materials such as floor tile, wall tile, porcelain, ceramic, slate, stone and cement board Do not apply excessive pressure – let the tool do the work Compatible to Dremel US540-01 Brand: MTP RPM: 20,000 Fit for Dremel Saw Max Series For use on Dremel l SM20-02 6.0 Amp and Rotozip zipsaw RFS1000; arbor size: 7/16 inch