Bullnose radius router bits shape the full edge of a work piece with a bullnose radius bit. Ideal for shaping stair treads, window sills, table and counter edges, shelves and making moldings. The nose diameter is the thickness of stock that can be nosed, i.e., given a full 180-degree round over. Flats at top and bottom of the cutting edges create fillets on stock thicker than the nose diameter. Must be used with an edge guide on handheld routers or the fence on a router table. Maximum rpm 10,000. Use in a table-mounted router. Not for use in a handheld router.