Made of high quality tungsten steel, strong and sturdy. Shank diameter: 6 mm. Design: ball shape, with cut end. Easy to use: convenient, safe and reliable control. Two kinds of end for choice: single slot and double slot, single slot is suitable for hard material such as iron, steel and copper the double slot is suitable for soft materials such as wood, aluminum and plastic. and nbsp Content: 1 rotary file. Size: Double slot, 14x12mm Features: Shape: ball Versatile: Widely used for metallurgy, tool making, engineering, model making, wood carving, jewelry making, welding, chamfering, casting, deburring, grinding, the cylinder head Portage and sculpture Use: It is an essential accessory for sculpture and DIY enthusiasts, easy to grip and use, safe and reliable. Features: Material: tungsten steel. Slot type: double Double slot: commonly used for soft materials such as wood, plastic and aluminum materials. Single location: commonly used for hard materials such as iron, copper, steel, etc. Shank diameter: 6 mm. Content: 1 rotary file.