Compact Shopping Cart Key
thingiverse
A removable, compact shopping cart key designed for Canadian 25 cent coin (quarter) cart locks. Fits nicely on a key ring and doesn't get in the way. This design also allows you to remove it after unlocking the cart, so your keys aren't stuck in the cart while you shop. The coin diameters are very similar to Euro coins, so this will likely also work for 50 cent/1 Euro coin locks (untested).
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