I bought a set of these (yes, you do get a pair) to take to the gym with me. There's a few reasons for this:
Firstly I get sick of hunting for gear that people have left in random places, assuming it isn't already in use by someone else (it's a busy gym!).
Secondly their attachments are getting a bit knackered now, don't rotate smoothly, super squeaky, etc.
Finally, and the main reason I bought them, the attachments at the gym are all overly long (from handle to attachment point), so often the weight stack will run out of travel before you can get a decent stretch on the muscle. I'm a big believer in loaded stretches being important for muscle growth (and studies now seem to back this up) and so I've been looking for a pair of high quality shorter handle attachments for a while now. To be honest, I had pretty much given up as most attachments seem to be a lot bigger than they need to be.
Anyway, these handles have delivered exactly what I required. I did swap out the carabiners for some shorter ones, just to reduce the overall length even further. Just make sure the carabiners are rated for the required load if you decide to do this. That said, the carabiners Strength Shop supply are very high quality so I'm sure I will make use of them elsewhere.
I've now tested these on various cable exercises, heavy 1-arm pulldowns, cable flyes, lateral raises, etc, and they are very solid and super smooth. Also, both the attachment ring and the handles rotate, so they are as versatile as you could possibly want.
Finally, it's also worth mentioning what good value these are. Look at what other vendors charge for something of similar quality, and you'd be lucky to get one handle for this price. I'm sure these will last me for many years to come, but if I ever do need another set I know where to come!