The link is a bit of a hassle to install, since you have to tighten the nut at the back, while holding the screw secure at the front. The way it works is the screw is first threaded into the rear link plate until the shoulder on the screw is stopped against the inside of the rear link plate. The nut is then threaded onto the screw threads protruding outside the link plate. Once installed properly, it will not get loose or require retightening. Of course, you can just remove the inner + outer link set and replace it with a conventional link that is assembled with a chain tool. If you don't plan on frequent chain removal and installation, then a non-master link setup makes more sense.