a few years ago I bought 3 Scaller Security locks for my guitars and basses, and I really like them, very easy to use and last longing, but those Scaller now cost triple mora than that time... and I bought this one because its a lot cheaper (same price as the Scallers 4 years ago) and the are Virtually identical.
I was't sure before I got them but side by side is not much diference, so I'm really happy with them.
the quality I would say is the same as the Scallers, but I'm no 100% sure cuz I don't know if it was bad luck but 1 of the locks is a little bit stuck, is a little bit harder to function, the other one is perfect.
probably the quality control is not that meticulous but everything is working. with a bit of oil might get better?
It might be