Visible Diamond Concentration. 9 Pcs Pack Professional Grand Trapzoid Diamond Grinding Shoes For Blastrac Floor Grinding Machine, or other common grinding machine such as Diamatic, Sase, CPS, etc.. High Quality Diamond Material For The Excellent Performance Medium Bond Segments For Grinding Medium Floor, 1 Or 2 Segments Are Optiona Special Design Different Segment Shape From Aggressive Grit to Fine Grit 12mm Segment Height, Long lifespan, Good Value Wet & Dry Use Professional Grade Diamond Grinding Shoes, Trapzoid style for Blastrac Floor Grinding Machine, Or Other Common Grinding machine Such As Diamatic, Sase, CPS, etc. Medium bond for Medium Floor. Perfect For Fast Removal Of Coatings such as Glue, Epoxy, Paint, etc. Fast & Aggressive Grinding Concrete, Terrazzo, Stone Floor. 16Grit - Arrow Segment 25Grit - Rectangle Segment 40Grit - Oval Segment 80Grit - Oval Segment 150Grit- Round Button Segment