Tungsten Carbides make light work of the tough materials and is an extremely hard wearing and long lasting material. Although designed as a throwaway item it can be sharpened on specialist equipment such as Robert Sorby's ProEdge when fitted with a diamond belt. (Made much easier with the aid of the tip holder, RSTM-TH) Square Cutter (RSTM-CT1): Used for generating square shoulders on tenons where a turned part is to be assembled in to a hole – a chair leg is a good example. This cutter is useful on the outside of a round form as well as long straight sections on spindle work. A superior finish can be achieved by making your final cuts in shear scraping mode. Round Cutter (RSTM-CT2): A general purpose cutter used for rapid removal of material both inside and outside of bowls and hollow forms – works equally efficiently on spindle work. In shear scraping mode it will produce an extremely fine finish requiring little or no sanding. Detail Point Cutter (RSTM-CT3): Contrary to its description this cutter is the first choice when roughing square to round both quickly and safely when turning between centres (spindle work) Also extremely useful for creating fine detail on spindle and bowl work. Shear scraping is not advised with this cutter.