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. Also known as a roundover, rounding-over and quarter-round. If a smaller pilot bearing is used, a second shoulder can be produced, in effect making the bit a beading bit.

• D-bit width = 1-1/2"
• B-blade height = 3/4"
• d-shank diameter = 1/2"
• L-overall bit length = 2-5/8"
• R-radius = 1/2"