1. has strong hardness and wear resistance2. the incision resistance is small, increases the opening speed, long service life3. industrial grade coated carbide point with 4 cutting edges4. can be installed on the hand drill, electric drill5. suitable for ceramic, granite, tiles, stone, wood, plastic, concrete wall for drilling holeSpecifications:Bit type: tile & glass drillcolour: brownMaterial: Cemented carbidesize: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mmPackage Contents: 7 * Drill BitOnly the above package content, 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.