Features: Perfect for toolmaking, engineering, model engineering, wood carving, jewelry making, chamfering, deburring, grinding, cylinder head porting, and carving tools. Effortless operation allows you to easily and quickly remove a variety of materials. The coarse coating provides fast material removal while leaving a relatively smooth finish. Suitable for your power tool, designed to fit most standard angle grinders, making it the best performing tool of its caliber. A good helper, it can save you time and energy, allowing you to concentrate on the task at hand. Specification: Material: Carbon Steel Color: Black Size: Hole Diameter: About 10mm(Suitable for angle grinder) 10mm: Suitable for 100 type angle grinder. Package Included: 1 * Rotary Grinding Head Notice: 1.Please allow 1-3cm deviation due to manual measurement 2.Actual color may be slightly different from the image due to different monitor and light effect