9tlg tile drills in 7ggr meet your 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 for drilling glass, , tiles and other hard and spared materials. The 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 and do not . They fit most normal electric hand drill, bench drill etc.Color: goldenTile borer sizes: 3\/4\/5\/6\/8\/10 \/ 12mmHandle 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, 8mmTile drill material: carbon steelNote: 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: 1 x 12mm hexagonal tile drill1 x 10mm hexagon tile drill1 x 8mm hexagonal tile drill3 x 6mm hexagonal tile drills1 x 5mm hexagonal tile drill1 x 4mm hexagon tile drill1 x 3mm hexagon tile drillOnly the above package contents, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.