It's not a stress-ball ...It is a STRESS ROCK!
These stress rocks fit nicely in your hand and make a great training and warm up aid.
Some hand strengthening products can strain unconditioned hands but these are much gentler on your paws. They are not too soft and not too firm! They are also good for warming up hands before a climbing session ....and they look cool sitting on your office desk .....where they may also assist with stress relief!
They come in black with a green logo of "The Hangout".
* (Please make sure that you keep them out of reach of animals and small children as they may be tempting to chew on.)