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. & nbsp; Content: 1 rotary file. Size: Double slot, 16x14mm 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.