Self guiding 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 roundbullnose for stair treads can also be produced by taking a second pass from the opposite side of the workpiece specifications d28 mm c12 inch c127 mm b95127 mm r79 mm shank diameter14 inch