Kutzall 1 x 1 In. Sphere 1/4-In. Shaft Burr, Coarse is designed for use with flex shaft tools, hand grinders, and other machinery that accommodate 1/4-inch collets or adjustable chucks. These sphere burrs are highly versatile, excelling at hollowing out and shaping concave surfaces such as spoons and bowls. They provide fast stock removal while delivering an outstanding finish and are resistant to loading. Cleaning is simple, as they can be cleaned with solvent or burned clean with a gas torch without damaging the teeth. This coarse burr is an excellent choice for precise and efficient material removal in detailed work. Model Number: S-1