Trend Self Cutting Rounding Cutters - 3.2mm, 6.3mm, 9.5mm. These cutters are used for rounding over 3.2m, 6.3 or 9.5mm radius without the use of a side fence, depending on the selection you choose. These cutters are supplied with two baarings of size; the larger baring is used for rounding over.
eBay