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 Round/Bullnose For Stair Treads Can Also Be Produced By Taking A Second Pass From The Opposite Side Of The Workpiece.PTDTREDIR4698X12TC