Without comment on the merits of using these versus leaving your Alembic bass alone on the stand, placing it in the case, locking it in the car, or simply leaving it at home, these devices do fit a 4 string (or 5 if narrow) Alembic bass neck. While most of my Alembics and other basses are 1.5 - 1.78 nut width, I have two of these devices and they do fit them all. I bought them not to stop the bolt-cutter equipped thief, but simply the snatch and run kid. One can attach the loop end to the speaker cabinet, which will be a little heavier, at least in my case, than the guitar stand. The locking end can also be used to secure the guitar case (through its handle) to a large, heavy object, if desired.
While they may not be for everyone or every situation, they generally do what they are claimed to do. Not foolproof, but better than just leaving the bass on its stand or in an unsecured case.
Jon
