At Ghost Custom Blades, we try to use the best products available to the handmade knife maker. For instance, the epoxy we use has been used by NASA on the nose cone section of the shuttle. We primarily use 440C stainless steel for our knives. To be blunt, there is no one material that can be labeled “the best.” There is, however, a consensus feeling among most custom knife makers that 440C stainless steel produces one of the best knives. There appear to be two simple reasons favoring 440C blades over the other steel blades: they’er easier to sharpen in the field, and they resist corrosion.