Features 1、Select good-quality diamond particles, and a reasonable formula can effectively improve the sharpness and wear resistance 2、Straight shank design, suitable for most hand electric drills on the market, with a wide range of applications 3、Suitable for opening holes in granite, marble, all-ceramic tiles, vitrified tiles, etc. 4、Applicable equipment for hand drill, bench drill, very versatile and practical 5、Diamond core bit with stable structure, excellent performance and long service life Specification Item Type: Diamond Drill Bit Material: Diamond Drilling Specification: Approx. 40mm / 1.6in, 50mm / 2in, 55mm / 2.2in, 60mm / 2.4in Shank Diameter: Approx. 10mm / 0.4in Working Depth: Approx. 58mm / 2.3in Applicable Equipment: Hand drill, bench drill Head Size: Approx. 8mm / 0.3in Package List 1 x Diamond Drill Bit