Diamond grinding shoes or concrete grinding shoes are the diamond tools used on the floor grinders for grinding the concrete floor and terrazzo floors. There are many different brands of floor grinders, and they need different types of diamond grinding shoes to match with. This trapezoid diamond grinding shoe has 3 9mm holes and is designed for ASL floor grinding machines. 2 excellent 12mm height diamond segment bars provide high performance and long lifespan. Sunny Superhard Tools prepared great diamond bonds to fit different hardness of concrete. The regular packing is 6/9 pcs per box. OEM/ODM service is supplied. Small orders are available. Optional Specifications Optional Diamond Grit 6#, 16#, 36#, 60#, 80#, 120#, 180#, 220# Optional Metal Bond extremely soft, very soft, soft, medium soft, hard, and very hard Optional Packaging 6 or 9 pieces per box Optional Painting Color High light or Matt, common colors are: orange, yellow, red, black, purple and blue Other services OEM/ODM service is available, such as logo engraving(free), painting color(free), and etc. SYF-A07SYF-A07-B