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double edged axes are cool one side you put a 20 degree angel to the blade.
the other you put a 40 degree angel. 40 degree angel side for chopping close to the ground
20 for chopping down trees....

The Angel you sharpen a tool like a knife depends on what it's used for. If ya going to hack away at a tree with a bowie knife or type of cheap knife you do put a 40 degess angle on the tool. With a...