Kutzall 1/4 x 1/4 In. Sphere 1/8-In. Shaft Burr, Coarse is designed for use with flex shaft tools, hand grinders, and other machinery equipped with 1/8-inch collets or adjustable chucks. These burrs are known for their durability and ease of cleaning, as they can be cleaned with solvent or even burned clean with a gas torch without damaging the teeth. They resist loading and provide fast stock removal while delivering an outstanding finish. I for hollowing out, these sphere burrs excel at creating hollowed areas with undercut or overhung edges and are for shaping concave surfaces such as spoons and bowls. Model Number: S-14-E