Draper Tct Tile And Glass Drill Bit Set (6 Piece) | Dbtgs1The Draper Tile and Glass Series are precise drill bits with a spear shaped tip designed for drilling tiles, ceramics, marble, glass and mirrors. Made from carbon steel with a professionally ground tungsten carbide tip for a faster cut and longer service life. Double flute design prevents material from clogging the hole, providing rapid stock removal. Fitted with a non slip shank to prevent slippage. The TCT tip and double flute mean these drill bits