High-Quality Material: Crafted from steel, these burs promise long-lasting performance. Each set is neatly packaged in a reusable plastic pouch, making it easy to store and transport. Craftsmanship: Manufactured in Switzerland, these tools are engineered with and are designed to meet the highest standards of quality and efficiency in jewelry making. Specific Dimensions: Each bur measures 44.5 millimeters in length and features a 3/32 inch (2.35 millimeter) shank, making them compatible with most standard jewelry tools and providing versatility in use. Ideal for Work: These deluxe burs are perfect for intricate filing, precise stone setting, and other jewelry applications, ensuring high-quality results with every use. Comprehensive Set: This assortment includes 12 hart burs in a range of sizes from 0.90 mm to 2.30 mm, allowing jewelers to achieve precise cuts and finishes for various designs and materials., Weight: 0.03637627323 pounds, Manufacturer: Aisuoka