Family1st Magnetic Case for Real-Time GPS Trackers - Powerful Twin Magnets for Easy Fixing - Weatherproof & Waterproof Stash Box for Storing Keys, Cash, Meds, Fobs, Jewelry, Money and More, Black

It fits one key perfectly and is a small size which will make it harder for people to find if you're using it for under your vehicle as a spare key. The magnets are very strong and I am pleased with how hard you have to pull to get them off that way I'm not worried about the box falling while I'm driving. It seems well built and very durable.

自宅の鍵を入れて、軒下の鉄部分付けて使用したのですが防水機能、接着力は申し分ないです。子供(小学生女の子)の力だと取れないです。

These things are awesome. Super beefy with a really strong magnet. I have no doubts about the safety of my key. It could be a little bigger as my key just barely fit but outside of that it's great.

This is great! The grip is amazing.

Im always locking my keys in my car ….typical adhd lolI only get 4 AAA calls a year. That includes flats, dead battery, tows, lock outs, etc. alot can happen in a year and wasting 4 calls on lockouts is ridiculous when u could just have this. U just “plop” it under the drivers side of the car… The magnet on this thing….its NOT going anywhere unless you intentionally pull it off. It stays closed and secure. All year round-im not worried about it. Its there when when i need it.