In the past I have used a file system and crock sticks to sharpen my two blade heads. They will easily shave my arm. I thought,I wonder how sharp I can get these, so I pulled out a Magnus 1 and sharpened it up real good. Then I put shaving cream on my face and tried to shave. It didn't work. I think I need a shallower angle on the blade for shaving. Maybe like a single bevel. I also don't know how hard the steel is in some heads. I use zwickeys and magnus for the most part, but am wondering how hard they are.Ever try this? Gary