Constructed from top-quality steel, these engraving bits exceptional durability and . perfect for detailed work, the burs range from 0.5 to 4 mm in size(0.5/0.6/0.8/1.0/1.2/1.4/1.6/1.8/2.0/2.3/3.0/4.0mm), accommodating various carving needs for professionals and hobbyists alike. Perfect for a wide range of materials including silver, jewelry, wood, and walnut, these burs are perfect for craftsmen and artists. Whether you're a professional jeweler or a woodworking enthusiast, find these tools indispensable for your projects. Designed to fit seamlessly with any 3/32 inch (2.35 mm) shank rotary tools, these versatile burs are perfect for electric drills, grinders, and more. They provide the convenience and flexibility needed for intricate engraving and carving tasks. Highly recommended for engraving delicate items such as olive cores, beads, , wood, and bone, as well as precious soft metals. These burs are specially crafted to handle fine details without damaging the fragile materials., Weight: 0.04519476371 Pounds, Manufacturer: muqeu