This item is quite small and the tag clearly shows its purpose: small chains in size #25-60. I would give 4 stars but for stated usage which is optimistic at best. If you really need to break the 520 chain this will work, although you will need a screwdriver and pliers to finish the job. inside the inner links and rotate it down until the pin is free, exposing the near side links. Depending on the size of the chain, you can try turning it all the way around, but my 520 ran out of thread so I had to use the tools above to finish the job. This makes it ideal for inclusion in a mobile device toolbox.
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