Originally Posted by
LUCAS
My coat hanger wire home-made tool has lasted me the better part of two years thus far. If it ever breaks, I am sure I can always find another wire hanger. It is just not about spending the money, but about recycling too.
Also, an old spoke works well. Bend a loop into it (where the circle part is on the pictured tool) and you get some extra springiness.
For whoever asked what those do, it holds the chain together so you can re-assemble a chain on the bike more easily. You stick the end hooks into some links in the chain.