1. Coarse grit: 16#,24#,30#,36#.
Could be used for un-even concrete floors, rough grinding preparation on floor or old floor renovation.
2. Medium grits: 46#, 50/60#, 60/80#, 100#
Could be used for all kinds of concrete and terrazzo floors, grinding preparation on floor or old floor renovation.
3. Fine grits: 120#, 150#, 180#, 200#, 270#
Could be used for all kinds of concrete and terrazzo floors, find grinding preparation on floor or old floor renovation before polishing.