Constructed from superior Steel, these jewelry burrs boast exceptional hardness and durability, ensuring resistance to wear and rust. Ideal for professional jewelers and hobbyists alike, they maintain their precision and effectiveness over time. This comprehensive set includes six meticulously crafted sizes: 008, 010, 014, 018, 020, 023, each designed to provide precise and smooth rounding for various wire gauges. Perfect for detailed jewelry making and finishing. Featuring a universal 3/32 inch (2.35 mm) shank, these cup burrs are compatible with a wide range of tools including rotary tools, drills, grinders, and hanging mills, making them a versatile addition to any craftsperson's toolkit. Ideal for a multitude of applications, these bits are perfect for carving and detailing work on softer metals like silver, as well as other materials such as aluminum, walnut, olive cores, and beads, enhancing versatility and utility of your crafting equipment. Colour:silver Material:steel Package Contents: 6 * Open Mouth Cup Burr Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.