I found a knife at work last spring and my boss said I could keep it. It is a cheap Dexter "iCut" knife and I can not sharpen it. I tried raised a burr and couldn't get to do this simple step in sharpening. I was wondering if the steel had anything to do with it not taking an edge. All of my knives are sharp and kept sharp, but I'm beginning to think this knife should be a garden knife to dig in the ground with. So is X45CrMo15 a PITA to sharpen or am I not getting something?