For those who prefer a steeled edge, the SteelPro is a revolutionary breakthrough. It delivers an edge that is far superior to conventional steeled edges. Incorporating super-hardened, non-abrasive miniature steels and precision angle guides, the SteelPro maintains your original knife geometry, creating microscopic serrations that not only cut better, but last longer so you don't have to steel as often. The SteelPro is easier and less intimidating to use than conventional steels. The design of the SteelPro ensures that no fingers are exposed to the knife edge and the precise angle guides make the process a breeze. Safe for all quality knives and backed by a one year limited warranty.