Do you mind if I ask a related question? I want a sharp edge on my shovels. They came from the store just dull and simple, the same width throughout. I tried to file one of them, but the shovel was harder than the file! How can I file the shovel? Also, should a hatchet be razor-sharp? I did a bit of sharpening with a stone, but it seemed to be inferior to the first tree I tried it on.