ITEM NAME:1 Diamond Drill Bit Tool (6mm-100mm) Set Glass Marble Tile Cutter New 6mm img *{margin:0;padding:0;.Suitable for various stones, ceramic, vetrified tiles, glass, marble etc. Start drill at 45 Degree to surface and align to 90 Degree as hole forms. 1 piece Glass Drill Bit. Material: Diamond. Holes Require No Futher Work As Cutting Is Clean.