Kutzall Extreme 1/4 x 1/4 in. Sphere 1/8-in. Shaft Burr, Very Coarse is designed with a rugged and very coarse coating that ensures superior performance. These sphere burrs are i for use with flex shaft tools, small rotary grinders, and other machinery that accommodate 1/8” collets or adjustable chucks. Featuring aggressive, razor-sharp tungsten-carbide teeth, they efficiently remove material with precise control while resisting loading. for hollowing out, these burrs can create hollowed areas with undercut or overhung edges and shape concave surfaces such as spoons and bowls. With Kutzall Extreme Sphere Burrs, you can spend more time carving and less time clearing your tool, making them an excellent choice for detailed and demanding projects. Model Number: SX-14-EC