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 workpce.

Brand Name	Trend
Manufacturer Model No	TRE46-118X1-2TC
Type	Router Cutter
Specification	D=18.7 mm, C=3/8 inch, C=9.5 mm, OL=49 mm, B=9.5 mm, B2=12.7 mm, R=3 mm, Shank Diameter=1/2 inch
Accessory Type	Router Cutter
Ebay Category	122829