Works very well for 1 key. Magnet holds well. Easily solved by applying super glue to the magnet and case.

Magnets are strong enough but don't stay fastened to the box. The magnet on the back is a joke and in no way lives up to the "strong magnet" description on the package. The magnets were not securely attached to the boxes.

Do not buy this item if you value your spare key; this item is a ripoff. It barely stays on my fridge and that's without the weight of a key in it. The key holder box is way too short to put a car key in.

Two of the magnetics fell out of the package. It looks like the epoxy adhesive had barely made contact. It's made of flimsy plastic with a magnet only remarkable for its weakness.