Vulcan 456831OR Glass and Tile Drill Bit Set, 4-Piece, Carbon Steel, Metallic Gray

Glass and Tile Drill Bit Set includes 1/8 in, 3/16 in, 1/4 in and 5/16 in bits. All sizes 3/16 in and larger have 3 flats on the shank for a better grip on the drill chuck. Provides smooth, accurate drilling in ceramic tile, mirrors, glass and marble tile.