Trend 46/17X1/2TC Bearing guided ovolo cutter 19mm radiusWith alternative bearingSelf-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.Specification-D=51 mmC=25 mmB=9.5 mmB=12.7 mmR=19.1 mmShank Diameter=1/2 inch