Features 1、Using high‑quality diamond particles, a reasonable formula can effectively improve the sharpness and wear resistance. 2、The straight shank design is suitable for most hand electric drills on the market and has a wide range of applications. 3、Can be used with electric hand drill or bench drill, with fast rotation speed, fast drilling speed, stable performance and high efficiency. 4、There are four sizes of 32/35/38/45mm to choose from, which can meet different needs. 5、Hole drill bits are suitable for drilling holes in granite, marble, ceramic tiles, vitrified tiles, etc. Specification Item Type: Hole Drill Bit Material: Diamond Drilling Specification: Approx. 32mm / 1.3in 35mm / 1.4in 38mm / 1.5in 45mm / 1.8in Shank Diameter: Approx. 10mm / 0.4in Working Depth: Approx. 58mm / 2.3in Applicable Equipment: Hand drill, bench drill Package List 1 x Hole Drill Bit