Wallet with spring "lock"

This wallet is designed to hold 3 cards and some cash. I have also uploaded the step files so you can easily adjust the tolerances or dimensions to suit your needs. There is a bump in the top part for easy access to cash. 

I printed with 0.2 layer height and Hilber Curve bottom layer infill for better look. 

Just slide the bottom part into the top part and use some glue if its not tight enough.