Features Scope of Application: The hole size of this spherical burr is approx.10mm/0.4in, which is suitable for 100 type angle grinder. Professional Made: The thick coat of this wood carving burr provides fast material removal, and leaving smoothly finish, especially for woodworking projects. Fine Polishing: This spherical carving rotary file is fine polished with sharpness edge, designed for wood, plastic and light alloy forming. Wear Proof and Durable: This spherical carving burr is made of alloy steel, quenched to improve wear resistance, the tungsten carbide teeth provide excellent wear life. Wide Usage: This woodworking burr is ideal for tool making, engineering, model engineering, wood carving, jewelry making, chamfering, deburring, sanding, cylinder head transplanting and engraving. Specification: Item Type: Spherical Wood Carving Burr Material: Chrome Vanadium Alloy Steel Specification: Approx.10mm/0.4in Suitable for: 100 type angle grinder Usage: Ideal for tool making, engineering, model engineering, wood carving, jewelry making, chamfering, deburring, sanding, cylinder head transplanting and engraving Package List: 1 x Spherical Wood Carving Burr Note: Please allow 1-2cm error due to manual measurement. Thanks for your understanding. Package List 1 x Spherical Wood Carving Burr