Quote:
Originally Posted by 2metalhips
Old school threaded bb lockring spanner.
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Close, but actually not a BB tool. Note that there are no tips on the edge of hook with which to grab BB lock ring.
This tool is actually an old-school cog remover. The half moon hooks actually have grooves inside that engage with cog teeth allowing you to remove cogs from old freewheels and also track cogs.
Here is pic where you can see the inner grooves...