It has a really strong magnet as described. I like it. However, here in Pennsylvania I still wouldn't put it on the underside of a car where winter snow or slush can easily strip it off. It works well on the top frame or sheet metal surface. It's big enough for a large Ford chip key. I wrapped the key in plastic wrap to protect the key from corrosion which has been a problem with other key holders I've used. (not this brand) Better safe than sorry. I am changing my rating. I kept my key safe until I needed to use it. The key holder detached from the surface but the magnets stayed. Miracles in one fell swoop.
UHPPOTE Electric Strike Door Lock Kit System With Remote Control And Fail-Secure Design
15 Review
Majority Commercial Door Products: Proximity Weigand-Compatible Readers
4 Review
Proximity Clamshell Compatable Systems Majority Commercial Door Products for Commercial Access Control
4 Review
UHPPOTE 433MHz 1-Button RF Wireless Gate Door Opener Remote Control Transmitter
13 Review