Constructed from premium quality Steel providing superior hardness and durability. Our comprehensive Jewelry 90 degree hart-burs set features 6 versatile sizes including 0.8/1.0/1.4/1.8/2.0/2.3mm. This variety of sizes caters to different uses and materials, letting you do precision work effortlessly, and produce smooth finishes on your art pieces. Each burr comes with a 3/32 inch (2.35 mm) shank, specifically designed to suit most rotary tools, drills, grinders, and hanging mills. The optimal shank size provides exceptional stability, ensuring precision and accuracy in every project. Universal in application, these burrs are perfect for carving a wide spectrum of materials like silver, wood, olives cores, and beads. Additionally, they are gentle enough to work on precious soft metal without causing any damage, making them a must-have tool for artisans and hobbyists alike. The package contains 12 pieces of 3/32inch shank jewelry making 90º hart burs. Each of these burrs is optimally made to help you achieve the best result in your jewelry making, wood or metal crafts. Colour:Silver Material:Metal Size:0.8/1.0/1.4/1.8/2.0/2.3mm Package Contents: 12 x Burr bit Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.