Kutzall 1/4 x 1-1/2 in. Ball-Nose 1/4-in. Shaft Burr, Coarse is designed for use in flex shaft tools, hand grinders, or any tools equipped with 1/4-inch collets or adjustable chucks. These coarse ball nose burrs are versatile and can create flat surfaces, round-over edges, concave shapes with the rounded top, and radius-bottom grooves. They are easy to maintain and can be cleaned with solvent or burned clean using a gas torch without damaging the teeth, ensuring long-lasting performance. Model Number: BN-14