Amana CONVEX EDGING BIT 1/4 SHANK 51580

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.