Kutzall Extreme 3/8 x 3/8 In. Sphere 1/8-In. Shaft Burr, Very Coarse is designed for precision and efficiency in material removal. Featuring a rugged and very coarse coating, these sphere burrs are for use with flex shaft tools, small rotary grinders, and machinery equipped with 1/8” collets or adjustable chucks. The aggressive, razor-sharp tungsten-carbide teeth ensure precise control while resisting loading, making them i for hollowing out and shaping concave surfaces such as spoons and bowls. These burrs excel at producing hollowed areas with undercut or overhung edges, allowing you to spend more time carving and less time clearing your tool. Experience enhanced performance with the Kutzall Extreme Sphere Burrs. Model Number: SX-38-EC