Amana 51580 Convex Edging Bit 1/4 Shank Router Bit
Cuts a shallow arc"the fingernail shape"rather than a full 180-degree roundover. Like the bullnose radius bit it has short flats above and below the cutter arc which produce fillets on stock thicker than 7/8". Must be used with an edge guide on handheld routers or the fence on a router table.