Self-guiding cutters' class='desclinks'>cutters for rounding over edges do not require a side fence. They are supplied with two bearings. Use the larger bearing for a round-over. If the cutter is lowered, a top quirk can be produced. A full round/bullnose for stair treads can also be produced by taking a second pass from the opposite side of the workpiece. Dimensions: D=1 inch D=25.4 mm C=13 mm B=9.5&12.7 mm R=6.3 mm Shank Diameter=1/4 inch Shank Diameter: 1/4 Grade: TCT Diameter Metric: 25.4 Cut Length Metric: 13 Bearing Diameter Metric: 9.5