Use with our concrete floor grinder. Can be used wet or dry and are ideal for smoothing rough surfaces or trowel marks, grinding or polishing terrazzo, repairing surface damage to concrete slabs, removing urthane or epoxy thin coats, grinding sharp aggregates such as flint & granite, removing surface imperfections from epoxy mortars, leveling high spots, and removing thin mastics and thin-set. Maximum output: 2500 sq. ft per 8 hours at 1/32".