The SM00 handle is a fixed heavy-duty cast metal handle particularly suitable for woodwork, leather crafts and model making and the cutting edge requirements of the handy person and D.I.Y. enthusiast. The handle is opened with the aid of a screwdriver or small coin. The SMOO is supplied with no Blades. Handle length 123mm, width 19mm, thickness 9.5mm. There is a choice of 4 heavy-duty blades: 401-2, 404-2, 405-2, and 406-2 (Swann Morton 4302)