Description: 【Premium Material】: Crafted from quality vanadium steel, these burrs offer exceptional hardness and wear resistance, ensuring durability and long performance 【Versatile Functionality】: Ideal for engraving a variety of materials including silver, jewelry, wood, walnut, olive cores, beads, and precious soft metals 【Comprehensive Set】: This set includes six burrs with 3/32 inch shanks in various sizes (0.8mm, 1.0mm, 1.4mm, 1.8mm, 2.0mm, and 2.3mm), providing versatility for different project needs 【Wide Compatibility】: Designed to fit rotary tools such as and grinders seamlessly; ideal for both professional jewelers and hobbyists looking to enhance their tool collection 【Complete Package】: Comes with a total of six bits in the package to meet diverse crafting requirements efficiently while ensuring you have the right tool at hand for any task Specification: Material: Vanadium Steel Size Chart: 0.08cm/0.03inch 0.1cm/0.04inch 0.14cm/0.06inch 0.18cm/0.07inch 0.2cm/0.08inch 0.23cm/0.09inch Package Includes: 6  Round Cup Burrs Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.