Feature:1. Select good-quality diamond particles, and a reasonable formula can effectively improve the sharpness and wear resistance2. Straight shank design, suitable for most hand electric drills on the market, with a wide range of applications3. Suitable for opening holes in granite, marble, all-ceramic tiles, vitrified tiles, etc.4. Applicable equipment for hand drill, bench drill, very versatile and practical5. Diamond core bit with stable structure, excellent performance and long service lifeSpecification:Item Type: Diamond Drill BitMaterial: DiamondDrilling Specification: Approx. 40mm / 1.6in, 50mm / 2in, 55mm / 2.2in, 60mm / 2.4inShank Diameter: Approx. 10mm / 0.4inWorking Depth: Approx. 58mm / 2.3inApplicable Equipment: Hand drill, bench drillHead Size: Approx. 8mm / 0.3in.Package List:1 x Diamond Drill BitNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.