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 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 drillHead Size: Approx. 8mm / 0.3in 1 x Diamond Drill Bit