Trend 46/118X1/2TC Bearing guided ovolo cutter 3mm 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=18.7 mmC=3/8 inchC=9.5 mmOL=49 mmB=9.5 mmB2=12.7 mmR=3 mmShank Diameter=1/2 inch