SODIAL(R) 4 Piece Ceramic Tile Glass Carbide Coated Drill Bits Set - 4, 6, 8 & 10mm 4 Professional Quality Tile & Glass Drills Use for Ceramic Tiles, Mirror and Glass Ideal for drilling fastner holes in bathroom tiles, or wall mirrors Spear pointed design reduces breakout. For use with drills that have a 3/8"" or larger chucks Sized at 4mm, 6mm, 8mm and 10mm