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Monster Magnetics MiniMag Plus Stash Box Hide A Key

MiniMag Plus - Plus-Sized Magnetic Stash Box


Monster Magnetics® MiniMag Plus™ is our Plus-Sized all-weather magnetic storage container. 16 cubic inches of storage space to stash your goods! Superior weatherproof protection and a Scary Strong magnetic grip.

Hide your stuff where nobody knows but you!

  • Dual Rare Earth Magnets are countersunk right into the enclosure and deliver a Scary Strong magnetic grip. 
  • Stash your stuff in, on, behind, or under your refrigerator, locker, or toolbox. Your washer or dryer. Your filing cabinet, safe, steel shelves, bed frame, vehicle frame - anything steel!
  • Waterproof to keep moisture out, Smell-Proof to keep odor in.
  • Mount your GPS tracker and extended battery. Used in the field by law enforcement agencies and professional investigators. 
  • Hide a key, set of keys, key fob, or spare garage door opener.
  • Conceal and secure your jewelry and cash.
  • Keep your meds out of reach of children.

Why MiniMag Plus™?

Tens of thousands of our magnetic stash boxes are in the field right now! Law enforcement and professional investigators mount GPS trackers under vehicles. Professional grade.

The main problem we see in similar products is the quality of the enclosure itself. Magnets break off, moisture sealant is inadequate. Ours are countersunk right into the enclosure and will not break off. Our screw/rivet-free design and gasket completely seal your contents from the elements.

But broken magnets and leaking enclosures aren't the only problems. Worse yet is something that seems simple, but that you never thought about until now.

You plan to mount it underneath a vehicle. When you crawl under a vehicle to place it, where do you put it?

If you fail to mount a GPS tracker in a recommended location, you're rendering it useless. You're blocking GPS and cellular signals and it doesn't work. Worse yet, your placement could damage or destroy your expensive tracker. Or you lose it.

We got you covered. We teamed up with GPS tracking experts. Our enlightening (and illustrated) Under-Vehicle Placement Guide will show you what to do. Follow the instructions printed on the outside of the packaging to download it - for FREE.

In The Box

  • Magnetic Enclosure
  • (2) Removable Protective Foam Inserts
  • Under-Vehicle Placement Guide (FREE Download, instructions printed on packaging)

MiniMag Plus Magnetic Stash Box What's In The Box


  • Enclosure: ABS
  • Magnets: Neodymium (NdFeb)
  • Hinges: Stainless Steel
  • Gasket: Marine-Grade Polymer
  • Inserts: Soft Polyurethane Foam

Monster Magnetics MiniMag Plus Magnetic Stash Box Interior Dimensions

Product Dimensions

  • Exterior: 4.8 x 3.5 x 1.8 Inches
  • Interior: 4.25 x 2.8 x 1.4 Inches

Use, Care & Maintenance

  • If using outdoors or on the underside of a vehicle, or with a GPS tracking device, download our Under-Vehicle Placement Guide
  • Clean with a soft cloth dampened with warm soapy water. Air dry.
  • Keep magnet assembly coated with a moisture repellent, such as WD-40® or silicone spray lubricant.
  • Keep gasket lubricated with WD-40® or silicone lubricant.

Did You Know They Come In 3 Sizes?

Make sure you've got the right fit! Take measurements of items you intend to put inside.  As an example, there are specific keys and fob remotes that are too long to fit in MiniMag and MiniMag 2. But they do fit in a MiniMag Plus.

Get the size you need with this comparison chart:

MiniMag Series Magnetic Stash Box - 3 Sizes

Click To See All 3 MiniMag Series Magnetic Boxes Side By Side

Easy Returns

We are just sure that the person about to get this awesome Monster Magnetics® stuff
will be thrilled, asounded, and astonished. If not, our bad. 😞

We have an easy, no questions asked one-click returns process.


Why Buy From Us

Customer Reviews

Based on 43 reviews
Size matters...

Products seems to be well-designed and constructed, thus predictably durable. However, ...I have a Jeep Wrangler and desired a placement under the hood (since you can access Jeep engine compartments without a key). Alas, the smaller unit was too little for my Jeep's key, and the larger one was too large for any available space under the hood that offered magnetic attachment. Suggestion: if the design included a loop or hole that would allow for a strap, plastic tie or carabiner for optional attaching, I could have easily used the larger one. Finally just taped my key to an engine hose, would have much rather have been able to use this product.

Exactly what I'd hoped for !

Very strong magnets and well designed enclosure !

Hi Anthony, and thank you so much for your comments! We're ecstatic that MiniMag Plus was exactly what you're looking for and that it's working well for you. Thank you again!

Thing is awesome!!

Hi Garret, and thank you so much for taking the time to post your comment. We're ecstatic that MiniMag Plus is working awesome for you!
Fits large keys!

It hasn’t fallen off the car yet. At least I don’t think so. I haven’t locked myself out or needed it. Maybe I should look and see if it’s still there...hmm.

Hello, and thank you so much for your comments. We're just sure it's still there :)
Love it


Hi Adrianna, and thank you so much for your comment. We're so glad that your MiniMag Plus is working out awesome for you! :)