Milwaukee carbide grit hole saws are designed for cutting abrasive materials such as brick, block, cement board, fiberglass and tile. Use a carbide tipped pilot bit when cutting ceramic tile, brick and other abrasive materials. Tungsten carbide grit edge for abrasive materialsCoarse grit and segmented edge for fast cuttingWide, angled and offset slots for easy plug accessIncludes carbide tipped pilot bitWorks with the following arbors: 49-56-7240, 49-56-7250, 49-56-9100, 49-56-7055 and 49-56-70401-1/4 in. diameter hole