Vitrex 10 2789 Hard Tile Drillbit Guide - Mini VIT102789 This Vitrex mini hard tile drillbit guide isthe ideal solution for drilling hard tiles. It features a rubber suction cup for instant positioning and individual slots for the most popular fixing sizes. Combined, these two features ensure ease of use.Ideal for use with Vitrex hard tile drillbits and water cooling system.Slot sizes: 4mm, 6mm, 8mm, 10mm and 12mm. VIT102789