Features: Ball Head Rotary File --- Sphere head with tungsten carbide teeth, 45mm shank length, 1/4-inch shank diameter,3cm super burr head. High Performance --- Extemely big rotary burr head with sharp tungsten carbide teeth, allowing you to easily and quickly remove a variety of materials. Saving you time and effort. Utra-long Life --- Made of heat-treated tungsten carbide, features high hardless wear-resist and durable for long time use. Suitable for machining variouskinds of metal material. Versatile --- Widely used for metalwork, tool making, engineering,model engineering, wood carving, jewellery making, welding, chamferring,casting, deburring, grinding, cylinder head porting and sculpting. Target --- This is an essential bit for metalworker & DIYcarving fans, easy to grasp and use, safe and reliable. Specifications: Material: 45 Steel Head Diameter: 3cm/1.18in Shank Length: 2.5cm/0.98in Shank Diameter: 1/4 in Item Weight: 99g/3.5oz Package Weight: 100g/3.5oz Package Size: 5.5*3*3cm/2.17*1.18*1.18in Package List: 1 * Carbide Burr