Designed to meet the needs of both the professional tradesman & the home handyman. All are Tungsten Carbide Tipped, to ensure longevity of working life, coupled with a good quality finish to the work. Ovolo produces a 2 stepped rounded profile along the edge of the material. The guide pin enables the cutter to follow intricate shapes. This rounding over bit produces a rounded profile along the edge of the material it differs from the Ovolo cutter by producing a single step only. Cutting Depth. 15.8 mm. Cutting Radius R 9.5 mm. Shank Diameter. 1/4 in.