1.00mm cutting diameter Made from high-quality steel Diamond tipped for durability 2.35mm diameter shank This high-quality Technique™ Diamond Shank drill has a cutting diameter of 1.00mm. It features a cutting surface coated with industrial-grade diamond particles. Diamonds are extremely hard and durable, making these drills highly effective for cutting, grinding, and shaping materials such as gold, silver, glass, ceramics, beads, stone, and more. As well as being ideal for precision tasks that require cutting or engraving hard materials, they are also extremely durable with a longer lifespan than standard carbide drills. Mounted on a 2.35mm diameter shank, the cutting part of this drill is 8mm.