NC Hand Grip Exerciser Strengthener,Four Finger Exerciser Ball and Hand Exercisers for Strength,Squeeze Ball and Stress…
Amazon.com Price: $7.99 (as of 11/01/2023 02:08 PST- Details)
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It is a grip strength trainer for adults, a physical therapy ball for hand spasm, arthritis, and stroke, a stress ball for mobile phone and computer enthusiasts, and a squeeze ball for people with ADHD.
The football shape with four finger holes is more in line with the hand engineering design, easy to hold, the hole diameter is 0.9in, suitable for the finger exerciser of most adults.