Kutzall 3/8 x 3/8 in. Sphere 1/8-in. Shaft Burr, Coarse is designed for use with flex shaft tools, hand grinders, and other machinery that utilize 1/8-inch collets or adjustable chucks. These sphere burrs are known for their durability and ease of maintenance, 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 burrs can create hollowed areas with undercut or overhung edges and are for shaping concave surfaces such as spoons and bowls. Model Number: S-38-E