General description The 9Pcs Diamond Coated Drill Bit Set is designed for precision drilling in various materials including ceramic, tiles, clinker, brick, plasterboard, concrete, and cement. This versatile set includes six different drill bits, two guiding drills, and an hex key, making it suitable for a range of hole sizes from 22mm to 73mm. Technical specifications Drill bits diameter: 22MM, 28MM, 35MM, 44MM, 68MM, 73MM Material: Alloy steel with diamond dust coating Usage This drill bit set is perfect for making clean and accurate holes in various materials. The diamond dust coating enhances cutting strength and performance, ensuring durability and ease of use. Other information