Not what you are thinking, but this low tech forearm/grip strengthen device is much better then the old squeeze grip spring device. The Dynaflex Pro Plus is a carpal tunnel saver and helps when you are board watching TV. Doing it in the office is a bit much,but holding on for 10 minutes is quite difficult. I have an original (the one without the rubber around it) and also a newer one. I like them both but once it get dirty and you lose the string it is really tough to start.