[going hot]

Push the button on the bottom of the headrest brackets and the whole thing comes off in a second.

Hidden, ok, but secure? No.

[Yo-Yo]

Push the button on the bottom of the headrest brackets and the whole thing comes off in a second.

The maker uses a drywall anchor toggle bolt screwed into the bottom of one of the two posts, so that the headrest cannot be removed from the seat once it has been installed.

Which would make it difficult to steal, but also make it almost impossible to remove from the vehicle, say after you sell your car.

https://www.theheadrestsafe.com/pages/installation-instructions