The Milwaukee® 1/4 in glass and tile drill bit features 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 provide faster tile drilling than standard glass and tile bits. The reinforced carbide head provides increased durability when high-speed drilling into tile and glass. These bits are specifically designed for drilling holes in glass and ceramic tile with drill-drivers only and are not recommended for use on porcelain tile. Milwaukee® Drill Bit, Single Ended, 1/4 in Drill, 2-1/4 in Overall Length, 0.1562 in Shank, Round Shank, Carbide Cutting Edge, Applicable Materials: Glass and Ceramic Tile