I received the Hand Grip Strengthener Exerciser, in exchange for honest review from Tomoson. The grips come in sets of two. I remember growing up, seeing my uncle Joe (died maybe in 2007), using hand grip exercisers. I wasn't sure what they was for, but I did enjoy trying to squeeze the exercisers. I didn't realize at the time, hand grips come in different weights.
These hand grips are easy to use. They also have soft foam handles. The grips are easy to squeeze. You don't need to adjust anything. These are great for stress relief, after the kids try my last nerves. The grips are also great for exercise and therapy for arthritis, carpal tunnel, and other hand therapies.
You can purchase the grips, using the link above. The grips are prime-eligible and reasonably priced.