A 3D-printable token to release shopping carts. The key has a hole so that it can be carried on a keyring and always handy.
We provide two versions as STL files. One in the shape of a Swedish 10 kronor coin, and a blank so that it can be used for any size of coins.
Just 3D-model a simple flat cylinder in the size of your coin and (Boolean) join it with the blank.