DOUBLE SEGMENTS - diamond encrusted W shaped segments for increased airflow, longevity and higher productivity PREMIUM EXTRA SOFT BOND - suitable for grinding extremely hard concrete and cap cutting GRIT SIZE & SET - #18/20 grit size includes 3 grinding discs in a set BOLT ON - 3 x 8.5mm non screw holes designed for grinding machines with 3 non threaded holes for the RTS Iron Horse Grinders USE WET OR DRY - recommended for Scanmaskin floor grinding machines Diamond grinding tooling designed for Scanmaskin floor grinding machines. Premium extra soft bond is ideal for extremely hard concrete and cap cutting. Comes in a set of 3 pieces, 40mm x 12mm x 12mm segment dimensions with #18/20 grit. Use wet or dry.