Diamond cup grinder wheels can have different bonds, grits, qualities and concentrations to fit different uses. Also referred to as diamond cup grinders or diamond grinders, these cup-shaped wheels are ideal for grinding cured concrete, hard brick or block and granite. Diamond grinding cup wheels are used in different roughness grindings. For coarse grinding, the bond should be softer, and the diamonds' quality should be higher, because in this case the diamonds become blunt more easily. The diamond grit should be bigger, normally from 35 grit to 50 grit and the diamond concentration lower.