9tlg tile drills in 7ggr meet your demand for different holes when using. The ceramic drill with strong toughness and wear resistance is more durable than the normal drill. The surface with titanium treatment is antioxidant and does not fade. APPLICATION: Best choice for drilling glass, ceramics, tiles and other hard and spared materials. The set of glass drill bits will help you to drill quickly and will not lead to broken porcelain. HEXAGON TILE DRILL: Thanks to the hexagonal design, the drills are easy to position. In use, the drills are firmer and do not slip. They fit most normal electric hand drill, bench drill etc. Color: golden Tile borer sizes: 3/4/5/6/8/10 / 12mm Handle length: 68,6mm, 69,7mm, 75mm, 76mm, 77mm, 82mm, 84mm, Tile drill diameter: 6.35mm (1/4 inch) Handle diameter: 2.5mm, 3.1mm, 4mm, 4.5mm, 5.4mm, 6.9mm, 8mm Tile drill material: carbon steel Note: When starting to drill or pierce the glass, you should control your power and be slow. Note: Drilling speed and pressure while drilling decrease and more lubrication (water) can effectively increase the service life. Package content: 3 x 12mm hexagonal tile drill 3 x 10mm hexagon tile drill 3 x 8mm hexagonal tile drill 9 x 6mm hexagonal tile drills 3 x 5mm hexagonal tile drill 3 x 4mm hexagon tile drill 3 x 3mm hexagon tile drill