I have a Fuse myself. I upgraded to my Wave about 2 months ago, but the Fuse is still a great tool. The knife metal is 420HC, same as a buck knife. Mine remained sharp for a long time, but sharpening was a breeze. It just took about 5 light strokes on an arkansas oil stone, and it was right back to shaving. I have read alot about people complaining about these blades not holding a razors edge. I got rid of the factory edge and put my own on it, and it solved that problem, but in part too, this knife is made for hard work, and probably isnt meant to be razor sharp, just sharp enough to do what it needs to do, but I still like my knives razor sharp.