Once you put a typical credit card in here, you need a pair of pliers to even get them out. The magnet is NOT strong as advertised. I would not recommend this to anyone. This is my first negative review of anything on the internet, but I feel that this product is really that bad.

Update one month later:
After about a month the card holder do stretch out slightly, but I am done with it and getting a new one. Still too tight for my needs.