Originally developed and continuously improved by Diteq, concrete floor grinders use horizontally rotating discs to level, smooth or clean the top surface of a concrete slab It is ideal for removal of rough finishes, epoxy, thinset, to flatten uneven areas or clean concrete slabs of sealers, paints or mastics. Grinders can also be used effectively to level uneven joints or high spots of 1/16 to 1/8 inch.