Initially this represents a significant investment. However, a Tormek diamond wheel offers a multitude of long term benefits. The wheel is 200mm in diameter, that will never change. It won’t hollow, dish or groove, it will never require dressing. Diamond is the ultimate abrasive material for sharpening. You can sharpen steels, ceramic and carbide. It will always perform efficiently. It offers rapid steel removal, requiring little pressure and quickly repairs a dull or damaged edge. The diamond surface provides a consistent, high quality finish to your edge tools. The greatest advantage it gives you is the opportunity to sharpen on its flat side as well as the periphery. Used together with an MB-100 multi base you can sharpen on the side of the diamond wheel to produce a completely flat bevel. The wheel comes with 150ml of ACC-150 Anti-Corrosion Concentrate. The Extra-Fine wheel (1,200 grit) will refine and polish the edges of tools such as fine carving knives and similar for a precision edge after sharpening with a coarser stone. These wheels fit Tormek T-4 models Original and Bushcraft, as well as earlier models with the same wheel dimensions (Tormek T-4, T-3 and 1200). Exceptional durability; never needs re-truing. Sharpens on the flat side as well as the periphery. Extra Fine 1,200 grit for refined and polished edge.