I have a couple of garage door springs. They are about 5/16 round (I haven't actually measured, but that is what I recall). Being that this is spring steel I have been trying to think of uses for the stuff for making tools, etc. The small diameter seems a bit constraining. I have the following thoughts, but would wonder what others might think and/or do with the stuff.
I was figuring you could weld it to the end of say some mild steel and shape to make edges for things like cutoff-hardies or chisels. Of course this is probably more work then it's worth (just go get a BIG coil spring and use that). The latest idea was to make some "cookie-cutter" type cutting dies for poping stuff out of sheet metal. Natually I could make any 5/16 or less punches and/or drifts that I might need.
Anyone have any other thoughts on good uses for the stuff?