Good value & so easy to use
These little connectors are ideal if, like me, you've bought a bike with a Shimano chain. The chains tend not to come with 'quick-release' connectors so, if you want to take your chain off for deep cleaning, you need something like this to help. A pair of connector release/joining pliers will also come in handy to make the job as quick and painless as possible.
These connectors seem ideal - cheap, functional, and strong. No issues so far, which is really all you can ask of them!