General description Made of high-quality metal, these round cup burrs offer high hardness, abrasion resistance, and rust resistance. The set includes 6 different sizes suitable for various jewelry making and crafting applications. Technical specifications Material: Metal Sizes: 1.0 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.3 mm Shank size: 3/32 inch (2.35 mm) Measurement allowed error: +/- 1-3 cm Usage Ideal for carving silver, jewelry, wood, walnut, olive core, beads, and valuable soft metals. Other information Packaging content: 6 pieces of 3/32 inch round cup burrs Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product.