49499. Carbide Tipped Corner Round 5/32 Radius x 3/4 Dia x 3/8 x 1/4 Inch Shank. The basic edge-forming bit, the corner-rounding bit rounds an edge to a given radius. The tool is shouldered to cut a fillet. The cut can be used to ease edges, as a simple profile, or as a part of a complex one.