It does everything they said it would do, and more. if used as directed. Use it often, It works very well.
You can see and feel the difference in a couple of weeks. You feel it on your stomach right away. Also works on your arms and shoulders. Takes little storage space and is worth the money. I had a similar product years ago. This version is even better with its wide wheel.
The quality is even better than the one I uses at class. I really like it. I just started Pilates class, my instructor recommended to practice by myself too, its the reason I bought one Pilates Ring.
He previously had a pair that were not adjustable, and were uncomfortable on his hands. He absolutely loves these hand grips. He states they are the most comfortable he's ever tried. He also is thrilled with the adjust-ability feature. He's 79 and has a few physical challenges - so anything that helps him maintain his strength makes me and his doctors happy. I would highly recommend these Hand Grip Strengtheners to anyone wishing to maintain or improve their grip. They arrived quickly and are better than described! !. I purchased these hand grips for my husband.
Purchased this product partly after learning NASA uses it and because it was more compact than another product I have that uses a bar and rubber straps. So far I love the ease of use and the ability to work multiple muscle groups one at a time. Excellent product for my age group, over 60 y. o. a.