Double action shopping cart coin for keychain

This shopping cart token when assembled can be carried on the key chain like all the others. Use it to release the cart and pull it out right away. 

But what if you encounter a shopping cart with a drawer like lock like in the second picture? Simply twist off the ring and use it like a standard coin.

The ring is the same size and thickness as a 1 Euro coin and locks with a bayonet type coupling to the holder. Make sure to print both parts oriented so you don't need supports and carefully clean the parts afterwards from tiny dips and strings. The first few times the coupling of the ring is quite tight.