Gorilla Sports Heavy Hand Grip, and what the lbs number means
A 14.99 EUR aluminium gripper sold in 100 to 350 lbs. Measured data says a 350 closes at about 176 lb, and varies wildly unit to unit.
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Atomgripz Thumb Piston Pro
A £99 brass and stainless thumb-only trainer with swappable springs. The one tool that fixes the weak link in pinch work.