In reply to UKC Gear:
I have a set, I use them at my desk at work. I have no idea if they're having a benefit - I haven't tried doing them on one hand but not the other etc, but it feels like it does. So anywhere from placebo benefit to actual benefit.
I can easily work up a pump doing various exercises, whether that's beneficial I don't know. I do like the feeling of stretching my hands while using them.
They're actually a lot better than elastic bands / a theraband tied up. I've tried them all. The finger holes and the different strengths make it a lot easier.
Whether they're worth £20 is a different question. For me? Yeah, why not, I'll grab anything that might help for the price of a couple of coffees.
P.s. pedantically, isn't it independent?