Not sure if this has been cover in the sticky's in this section or anywhere else. Forgive me if this is a repost of something that has already been covered. So i'm on the lookout for a device i can bring with me to work or anywhere outside the house to use for strengthening my hand & fingers. I've used this one before: http://www.amazon.com/Gripmaster-Ex...ise-and-fitness&ie=UTF8&qid=1390361756&sr=1-1 It actually gave me joint paint so I stopped using it. Don't think it was working that great either I've also used this but can't seem to find it in my house: http://www.amazon.com/ZON-ZNBK-HNDG...ise-and-fitness&ie=UTF8&qid=1390361756&sr=1-6 It was okay but didn't seem to do much for my fingers. Mostly just strengthening my thumb and overall grip I also used something similar to this and thought it wasn't that great http://www.amazon.com/WeiHeng®-Forc...se-and-fitness&ie=UTF8&qid=1390361756&sr=1-13 Does anyone have any suggestions with experience to back it up??? Any help is appreciated!