Lucky LineポーチキーHider XL、ブラック(91301)

Sturdy, thick. Holds spare key stuck to the underside of car's license plate in case of lock out.

Works okay, wish it was a bit biggier tho.

I find these to be of good quality. I have used them for years as I am a sr citizen and live alone. I have mentioned the use of these to several people throughout my life especially when they can't find their keys and are upset. Most look at me like I am a lunatic but ask yourself what will happen if you are alone and away from your comfort zone and loose or misplace your keys? In a cold winter or a dangerous part of town not having used this item could be very costly or fatal. I get one on the first day when I change cars. Yes, a car theif could find this and steal your car..... but what are the odds? I have never heard of a person taking the time to feel around under a car to steal it. My cars are used so maybe if I had a megaexpensive new car I might now take this chance,

I like this over the magnet version because it's more sleek, the sticky glue on the back is great and i just don't trust those magnets

You need a little patience installing it. First, the bolts used from the unit to the car must line up with the ones used to bolt the license plate to the unit, and this makes it a little tight to get wrenches/sockets where they need to be. Also, it would be nice if the "open" position (license plate hinged upward) would have a "stop" position, where the plate would hold itself up. These two issues make it a little tricky to install, but if you are persistent, it will go together just fine. I chose to use a very thin weather stripping foam with a self-adhesive inside the key compartment, to keep the key from rattling around. I also put a small piece of this foam between the unit and the license plate, to keep the plate from rattling when the car hits bumps. All-in-all, I'm very satisfied with the product and the idea. If it works well with the one car, I'll be installing on all of my cars.