The Arbortech Ball Gouge is a spherically shaped grinder attachment that can rapidly hollow small concave surfaces in woodworking projects. It offers exceptional control, balance and performance in freehand wood shaping and carving. This 30mm diameter ball-shaped cutter is ideal for crafting smooth hollows in wooden spoons, small bowls and is also useful for sculpting. The Ball Gouge features Anti-Grab Technology, which helps prevent the tool from digging in. It gently bounces out when moved across a wooden surface, creating a chisel-like texture. The tool has a unique ring-shaped cutter that has been engineered to self-sharpen when in use, prolonging the life of the cutter to provide optimal value and durability. Fits grinders with a 5/8” shaft (grinder sold separately).