For detailed grinding, shaping, and polishing work, this set of 10 diamond-mounted points from uxcell is super handy. Each bit has a tapered head (8mm at the widest point) coated in diamond abrasive, perfect for working on tough materials like glass, ceramic, precious stones, alloys, and carbide. They fit any tool with a standard 3mm (about 1/8 inch) chuck, like electric grinders, rotary tools (Dremel-type), or precision hand drills. The tapered shape is great for getting into tight spots, doing internal grinding, or adding fine details to your project. Each bit is about 1.77 inches (45mm) long total. They're made of metal with a silver tone. Whether you're a hobbyist working on crafts, a jeweler, or doing light industrial work, having a set of these on your bench means you're ready for a variety of precision abrasive tasks. A practical addition to any workshop.