Here is another grip training tool that helps you develop crushing grip strength. The Robert Baraban Adjustable Handgripper has springs with up to 250-lbs rating. It ships with 2 springs, each offering 19 settings.
More gadgets like this ➡️ : here
The lighter spring has 25 to 115 pounds resistance while the heavier one goes from 60 to 250 pounds.
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