Magnetic Key Holder for Under Car – Waterproof Hide-a-Key Box

Never pay for a lockout again.

Locking your keys in the car costs $150–$500 for a locksmith—often more for a smart key. This magnetic key box clamps to your vehicle's frame and keeps a spare key safely hidden, sealed, and ready. One small purchase means you're never stranded again.

It's not a gadget. It's cheap insurance against your worst-timed "oh no" moment.

Why drivers choose it

🧲 50 lb Magnetic Grip Dual neodymium magnets lock onto your car chassis, truck frame, or trailer and hold firm through highway speeds and rough roads. Attach it once and forget it's there.

🌦️ Weather-Sealed Protection A tight-sealing lid and molded PC+ABS shell keep rain, snow, mud, car wash spray, and road salt out—so your spare key stays dry and ready in any weather.

📶 Signal-Friendly Housing Unlike metal tins, the casing lets Bluetooth, GPS, and RF signals pass through. Perfect for key fobs, GPS trackers, and RFID cards.

🛡️ Cushioned Interior Soft internal padding cradles your key fob and valuables, protecting the electronics from jolts, rattles, and scratches.

🔒 Hidden & Secure Tuck it under a car, truck, boat, or any metal surface — out of sight and out of a thief's reach.

🛠️ Tool-Free Install in Seconds Wipe down any clean, flat metal surface and press it on. No screws, no drilling, no mess.

How it works

1. Clean — wipe any flat metal surface (undercarriage, frame, or fender well).
2. Press—set the box on and let the magnets grip.
3. Done — your spare is hidden and secured. That's it.

Who it's for

What fits inside

Spare car keys & fobs · emergency cash · ID & credit cards · GPS trackers · small batteries · and more.

The smart math

It pays for itself the very first time you would have called a locksmith. Everything after that is peace of mind.

Specifications

Shop with confidence

✅ Free insured shipping on every order

✅ 30-day money-back guarantee — starts the day your order arrives

✅ Secure checkout — your payment details are encrypted and protected

If it's not right for any reason, contact us and we'll make it right.

Frequently asked questions

Will it stay on at highway speeds? Yes. The dual neodymium magnets resist up to 50 lb of separation force, holding firm through highway driving and rough, uneven roads.

Is it weatherproof? The sealed lid and PC+ABS shell keep out rain, snow, road salt, and car-wash spray, so your spare stays dry in everyday driving and storms. (It's built for weather resistance, not for full underwater submersion.)

Will it block my key fob or GPS signal? No. The housing is designed to let Bluetooth, GPS, and RF signals pass through, unlike metal alternatives.

Where can I attach it? Any clean, flat metal surface — car undercarriage, truck frame, boat hull, tool cabinet, and more. Wipe the surface first for maximum grip.

Does installation require tools? None. Clean the surface, press the box on, and you're done.

Stop hiding keys in the wheel well. Secure your spare the smart way.