Rota-Tip Cutters are highly economical for use in production applications. The blades, which are manufactured from a harder grade of Tungsten Carbide than conventional tooling are rotated to expose a new cutting edge ensuring the diameter of the tool remains constant. Blades are replaced when all edges become chipped or dull. The Blades are fixed directly onto the tool body using torx screws and may be replaced without removing the cutter from the router. All Rota-Tip cutters are supplied with blade(s) fitted and a torx key. D1 1/2inch D1 12.7 mm Cut length 29.5 mm Overall length 100 mm Shank Diameter 1/2inch.