Diamond coated teeth for long life in the hardest tiles and abrasive materials, Cut-Out Slots to dissipate heat, Thread pattern made to international standard to accept all standard arbors. Note: a Sutton tile pilot drill must be used, Diamond Coating - designed for cutting glass, tiles, laminates, fibre glass, hard plastics, plexiglass, fibre cement, ceramics, graphite, carbon, marble and soft stone,