5/16" Tile Or Glass Drill Bit, Spear Point For Drilling Of Glass & Ceramic Materials, Carbide Tipped, Ideal For Ceramic Tile, Mirrors & Bottles, Carded.
4 Piece Set, Glass & Tile Spear Point Carbide Tipped Drill Bits, Consists Of: 1/8", 3/16", 1/4", 5/16" Diameters, Use On Glass, Mirrors & Tile.