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Here is another tool that gives you a killer grip. The Grip Freak ‘Slip Grips’ Grip Strengthener comes with a dumbbell loading hook. It has 1-3/8″ round rubberized handles. The welded swivel yoke allows 180-degree lateral motion.
The hook fits up to 1-3/4″ pull up bars. You can find out more about it here.
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