Item Type: Ball File_x000D_ Material: Chrome Vanadium Alloy Steel_x000D_ Purpose: Spherical Rotating File_x000D_ Scope of Application: Wood Grinding_x000D_ Colour: Black_x000D_ Applicable Angle Grinder Model: Approx. 10mm / 0.4in (100 type angle grinder), 14mm / 0.6in (115, 125 type angle grinder). 1HIGHER EFFICIENCY: A very rough coating can quickly remove the work blank as well as maintaining a relatively smooth finish. 2CHROME VANADIUM ALLOY STEEL: Having been through quenching and polishing treatment, this file has excellent durability. 3INCISIVE EDGE: The cutting edge has undergone fine polishing treatment, it's also arranged neatly to cut wood more smoothly. 4WIDE APPLICATION: This spherical drill bot can be flexibly applied to polishing, grinding, engraving and so on, very practical. 5EASY INSTALLATION: Compact in size and light in weight, it's very convenient to install the grinding head to the angle grinder.Please don't hold the spherical part directly to avoid being stabbed. Please wear gloves when holding the spherical part.1 x Ball File