General description Made of premium-milled Vanadium steel, these 10 Pcs Jewelry Setting Burrs are designed for precision and accuracy in lapidary making. The set includes assorted sizes suitable for various applications, including silver, jewelry, olive core, beads, bone, walnut, and precious soft metals. Technical specifications Shank size: 3/32 inch Assorted sizes: 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.3mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm Material: Metal (Vanadium steel) Compatibility and accessories Fits electric drills, hanging mills, bench mills, electric grinders, rotary tools, etc. Other information