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Nifty Gadget – Can you guess what it is?

I got this nifty gadget as a gift … any guesses as to what it’s used for?

Any guesses as to possible uses for this object?

3 thoughts on “Nifty Gadget – Can you guess what it is?”

  2. You can make them even easier if you get cassette cogs that are drilled, then you can just use chain rivets instead of welding it… tricky part is finding or filing the cog that fits bottlecaps nicely.

  3. Pingback: Nifty Gadget: Cog turned bottle opener | Waterloo Bikes

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