MULTIPURPOSE - designed remove floor coatings, smooth rough surfaces, level high spots or remove surface imperfections in concrete and terrazzo floors SEGMENT DIMENSIONS - 4 segments of 50mm x 10mm x 13mm SET OF 6 - set includes 6 diamond blocks and 6 wood wedges BOND/GRIT SIZE - medium bond, #30/40 grit WET OR DRY - recommended to use with EDCO floor grinders Diamond grinding blocks designed to remove floor coatings, smooth rough surfaces, level high spots or remove surface imperfections in concrete and terrazzo floors. The backing block and wooden wedge to securely fasten and align the blocks on your machine. 4 segments of 50mm x 10mm x 13mm and comes in a set of 3 diamond blocks and 3 wood wedges. Medium bond with #30/40 grit, comes in a set of 6 pieces, use wet or dry with EDCO, Husqavarna, Diamond Product floor grinders.