DOUBLE SEGMENTS - diamond encrusted W shaped segments for increased airflow, longevity and higher productivity SOFT BOND - suitable for grinding medium hard to hard concrete GRIT SIZE & SET - #18/20 grit size includes 3 grinding discs COMPATIBLE - designed for Scanmaskin floor grinding machines USE WET OR DRY - walkbehind grinder recommended Diamond grinding tooling designed for Scanmaskin floor grinding machines. Soft bond is ideal for hard concrete. Comes in a set of 3 pieces, 40mm x 12mm x 12mm segment dimensions with #18/20 grit. Use wet or dry.