TJR® 3/8" head Carbide Burrs Set with 1/4" Shank 5pcs and ULTRACo Coating - Double Cut. For Steel, Stainless Steel, Hardened steel, and Aluminum, WoodThe 5PCS Carbide Burrs Kit is an essential tool set for both wood carvers and metal engravers. Featuring high quality carbide construction with the ULTRA Co coating, these burrs are designed for longer lifetime and can handle hardened materials with ease. Whether you're shaping wood, engraving metal, or tackling a variety of other materials, this versatile set ensures effortless trimming and precision. This kit includes five different profiles to meet