MILWAUKEE® Glass and Tile Bits use an exact start tip for clean holes and minimal bit walking in glass and ceramic tile. Engineered with sharpened carbide, MILWAUKEE® Glass and Tile Bits will provide faster tile drilling than standard glass and tile bits. These bits are designed with a reinforced carbide head for increased durability when drilling in high speed. Ideal for glass and ceramic tile in drill-drivers only. Not recommended for porcelain tile.