... -Hot pressed 3.Usage on stones,brick, concrete etc. Diamond Cup Grinding Wheel1.Diameter:100mm-150mm2.High quality-Hot pressed3 ... double rows and turbo segment.4.Suitable for grinding and polishing concrete,masonry,brick,block and stone.ideal for heavier material ... bur),diamond core drill bits (diamond hole saw), diamond grinding and cutting wheels(diamond polishing wheel) and carbide rotary burrs ...