Bintiva, Hand Strengthener.  Hand grip works great, and wow it really can help with getting you strength back in your hand.  I just had surgery on my hand and lost a lot strength in my hand, this is a great product to help work my hand.  They have these at my physical therapy center.  I am so glad I have one, it is so easy to use. You can easily adjust the strength you want to use, just adjust the dial.  This has a great grip that I can hold.  Very well made.   Thank you for allowing me to try your product  I recommend this product. Disclosure: I received this product at a discount in exchange for my honest  and unbiased review.  I have no affiliation with this company.

http://www.amazon.com/Adjustable-Exerciser-Strengthener-Resistance-10-40kg/dp/B013KJ7RPI/ref=sr_1_1?s=sporting-goods&ie=UTF8&qid=1454012437&sr=1-1&keywords=hand+grip+bintiva

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