A self-guiding ovolo cutter. Designed for rounding over edges. Does not require a side fence for guiding.
Comes supplied with two bearings, of different sizes.
The larger bearing is used for rounding-over.
A top quirk can be produced by lowering the cutter.
By taking a second pass from the opposite side of the workpiece, a full round/bullnose can also be produced for stair treads.