I just wrote a similar review for the Dunlop Straploks. The Schallers are prone to loosening and coming apart, the Dunlops are not. If you keep on top of the Schallers and make sure that the nut on the strap is always tight, they're fine. But I've had them come apart on me several times, and I don't trust them anymore. I check them regularly, and I could put thread locker on the nuts, which will help, but I'm eventually going to replace all of my Schallers with Dunlops. In my view the Dunlop is a superior design.