DURABLE: These rotary burrs are made from strong, hardened carbon steel for durability IDEAL FOR WOODWORKERS: They are ideal for grinding, polishing, shaping and burnishing wood surfaces VERSATILE: With a 6mm (1/4") shank, the set includes five popular shapes: ball, oval, cylinder, large and small cone SMOOTH OPERATION: Engineered to deliver consistent performance DIY & TRADE USE: Reliable choice for both professionals and home projects, Weight: 0.2645547144 pounds, Manufacturer: DK Tools LTD