Features DURABLE MATERIAL & PROCESS Made of chrome vanadium alloy steel, hardened and uniquely polished to make spherical burrs durable. Sharp edge: the cutting edge has undergone a unique fine polishing treatment, and the cutting edge is sharp and neatly arranged to grind wood more smoothly. Applicable angle grinder model: the thread size of 14 mm, suitable for angle grinders of type 115 and 125, provides great comfort. FOR WOOD AND METAL MATERIALS: The spherical rotary file is suitable for carving, grinding and engraving wood and metal and is very practical. Quick removal: very rough coatings allow for quick material removal with at the same time relatively smooth surface, very efficient. Specification: Item Type: Ball Rotary File Material: chrome vanadium alloy steel. Application: Ball End Mill Scope of application: wood sanding Colour: black. Thread size: approx. 14 mm / 0.55 inches. Applicable angle grinder model: For 115 125 type angle grinders Package list: 1 x ball rotation file. Note: Do not hold the spherical part directly when using to avoid stab injury. When holding the spherical part, please wear gloves. Package List 1 x Sphere Rotary File