Floyd Rose HexHider Magnetic 3 mm 1 pc.

Very well made and clever little device.
I really like that it can just magnetically attach to the tuners and be there ready when you need it.
However, it has a major drawback.
If you use an Ibanez Lo Pro term system you cannot use it on the locking bridge saddles due to the way they are located . It's wingnut shape doesn't allow you to turn it as they sit so close to the saddle.
Other more traditional types of double locking systems should be no issue.
That said I'll probably get a few more of these to keep on my other double locking equipped guitars as they are very handy for locking and unlocking the Nut when needed.