ANCwear Hand Grip Strenghthener with 5 Resistance Levels (50-75-100-125-150 Lbs) Adjustable Strength Trainer Arm Exerciser Workout Non-Slip Gripper for Athletes Pianists Kids (Black)

Much better than a stress ball.I got the pair so I could have one at home to use while I'm watching television, and the other at work for when I'm stuck on the phone. I found that I prefer using them one at a time in any event because I can better focus on the exercise one hand at a time. At the highest setting, when I first started using them, 15 reps were challenging. Almost immediately, I experienced greater grip strength and more reps. Hardly a controlled scientific experiment, but I drink a daily B12 shot that has the cap wrapped in plastic. It's designed so that you tear off the plastic and then remove the cap. Prior to using these grips, it was my daily challenge to see if I could twist off the cap without removing the plastic. I could usually do it, but it was a challenge. Now I pop those suckers open as easy as opening a bottle of water.

Works well so far. I am hoping the turn screw doesn't fall off it seems a bit weak ready to break....so we shall see. I am pretty strong and the highest setting for me could be a little stronger and the light weakest setting is a little too light with reduced range ,,,but even so I get an excellent grip strengthening workout from the unit and it meets just about all of my needs. I think this range 22-88 pounds will meet most users needs even those with a need for light therapy rehabilitation from hand surgery or something a hand injury etc, elderly etc for physical therapy for light hand the lightest setting 22 pounds should work. If you are really strong this might not be enough but for most users this is a great item.

Because of arthritis and a tendency to tendinitis from my wrist to my forearm, and spending the day typing and therefore at risk of carpal tunnel, it's very important for me to perform hand grip exercises, and they've helped tremendously over the years. One of my last set of very basic grips cracked a few weeks ago, and researching reviews on Amazon brought me to buy Kootek's grip. With the ability to adjust tension and a guide to go along with it, this is by far the best hand grip I've used, at a reasonable price no less.

These work great! Having the adjustable strength is fantastic. My left arm is not as strong because of the tennis elbow. These make it easy to work out both hands at the same time, and at their own strength level. Plus now I can always be working out with this just like badguys in 80's movies

Bought this product in December and signed up for extended warranty, spring broke last week, how do I get a replacement under warranty.

These are exactly as you would hope for and expect. The quality is good, and they look as if they'll give several years of service. Because they adjust, they are useful for different family members who might have different needs.

Very simple and easy to use. with the adjustable tension, any size hand or strength can adjust to their preference.

I've had the curled spring hand grip strengthener for many years, but they're not adjustable. These are great and have the ability to adjust tension, so far I really like them.