The Milwaukee 1-3/8 in. Carbide Grit Hole Saw Bit has a tungsten-carbide grit edge great for abrasive materials and wide, angled and offset slots for easy plug access. A pilot bit is included. 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.