The Trend 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 is rotated to expose a new cutting edge ensuring the diameter of the tool remains constant. The Blades are replaced when all edges become chipped or dull. They are fixed directly onto tool bodies 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. Specifications: Cut Length: 29.5mm. Overall Length: 89mm. Cut Diameter: 12.7mm. Shank: 1/2in.