High-quality diamond particles and a refined formula effectively enhance sharpness and wear resistance. Straight shank design compatible with most electric hand drills for versatile use. Ideal for drilling holes in granite, marble, full-ceramic tiles, and glazed tiles. Suitable for use with hand drills and pillar drills. Features a stable structure, excellent performance, and long service life. Item Type: Diamond Core Drill Bit Material: Diamond Drill Bit 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, pillar drill Head Size: Approx. 8mm/0.3in Includes 1 x Diamond Core Drill Bit Your 100% satisfaction is our top priority. We are committed to providing excellent service. If you encounter any issues after receiving your product, such as damage or incorrect quantity, please contact us immediately for a resolution.