My housemate came home from work (outdoor retail) with a "demo" version of a BM 556. It is cool it has a clear handle and an unsharpened blade. Well it had an unsharpened blade until it met the Sharpmaker. Just using the grey and white rods as usual plus a little back bevel; he had it POPPING hair withing a couple of hours. I would not believe it unless I saw it. The knife now has a very fine razor edge; when we looked at it under magnification you could really see a very clean uniform edge. This really exhibits the power of the Sharpmaker even without the accessory diamond rods.