print in place
easy
car
easy print
key
useful
remote
practical
safe
safety
auto
automobile
security
secure
fob
antitheft
keyfob
thief
faraday
faraday cage

45
8
Protect your car from theft with this Safe Key enclosure.
This protects your keyless entry equipped car from theft. The thieves are using an amplifying device that receives the radio signal from your key fob, sending it on to a second thief at your car who can then unlock it, start it and drive off.
Check out this video!
https://www.youtube.com/watch?v=PEMOWPj2i-0
When your car remote fob is in this Safe Key enclosure, the bad guys can’t intercept the signal, unlock your car and drive away.
The Safe Key enclosure is based on the Faraday cage principle which blocks radio signals.
The hinged outer shell is completely print in place, no assembly of the outer is required.
PRINT INFO
Print settings I used:
Print the outer with 3 walls, this makes the latch stronger.
Any filament would be suitable, mine is PLA silk (regular PLA would probably make the catch stronger) outer shell and regular PLA for inner shells and lock rings
No brims
No supports
You need to print:
-one outer shell
-one inner shell lid
-one inner shell base
-two lock rings
It’s pretty simple to put together, but here’s a link to assembly instructions if needed:
You will need:
Aluminium foil 130x160mm to cover the inner shell base
Aluminium foil 140x170mm to cover the inner shell lid
If you think the design is ok, hit the like button. Or if you've got some improvement ideas, or anything else, leave it in the comments.
If you print it, leave a pic in the Makes, I'd like to see it.
Bill of materials
- NameQuantityNotes
- 1Aluminium foil1
Originality of the Model
The author declares that this work is their personally original model
This model is licensed under the following terms:
Credit must be given to the creator
Only noncommercial uses of the work are permitted
Remixes must be shared under the same license
Models(5)
outer.stlDesigner555.84 KB
2025-08-12
inner shell lid.stlDesigner232.80 KB
2025-08-12
inner shell base.stlDesigner232.80 KB
2025-08-12
lock ring.stlDesigner50.08 KB
2025-08-12
SafeKey.3mfDesigner312.18 KB
2025-08-12
View all(5)

