1.UNIVERSAL AND FUNCTIONAL - The sphere rotary burr is designed to fit a standard 4 1/2 or 5 inch American angle grinder with 5/8-11 threads. Just thread directly onto the angle grinder spindle and no adapters needed. Excellent for rough work, moderate shaping, contouring and grinding. 2.FINE POLISHING TREATMENT - The angle grinder attachments consist of hundreds of aggressive burrs which can quickly remove lots of wood while maintaining a smooth finish and handle wet or dry wood materials, guaranteeing fine and clean grinding of wood. 3.LONG LASTING SHARP - Made of carbon steel, the ball grinding wheel has first-class durability with less wear and can serve for a long time, delivering good results in soft wood such as spruce, pine, linden, beech and so on. More durable than sandpaper pads and improve the efficiency. 4.WIDE APPLICATIONS - Power sphere grinder attachment for hand wood shaping, hollowing out and undercutting wooden workpieces as well as roughing out a piece of wood. Great for carving wooden bowls, spoons, tree faces and other wooden art. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store