Bosch Ceramic Tile Drill Bit is made with highly durable carbide and features a long life with maximum wear resistance Built with a reinforced head that maximizes the lifetime of the drill bit, it features a centring tip for a precise drilling start This drill bit is designed with a 0.6 cm diameter and 8 cm length It is suitable for all soft to medium density tiles, porcelain, ceramics and non-toughened glass 500 rpm