The Reisser Diamond Tile Drill Tube, with a diameter of 10.0mm, is specifically designed for the rotary drilling of hard porcelain tiles up to PEI Grade 5.Diamond Coating: The drill tube is coated with diamond particles, providing exceptional hardness and durability for drilling through tough porcelain tiles.Suitable for Hard Porcelain Tiles: It is designed to handle the drilling of hard porcelain tiles, making it ideal for various tiling projects where precision and reliability are e