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Great to have a new pair that have a great grippy new rubber surface. However, the new ones are smaller in diameter than the original design (old: O. D. 3. 75, I. D. 1. 88, new: O. D 3. 4, I. D. 1. 75). Not sure if this was to accommodate people with smaller hands or simply shrinkflation. I've got big hands and these don't work quite as well as the old but still do a nice job. 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The trainer is designed to improve your grip strength, forearm endurance and muscular activation. Its unique design allows your forearms to move in a natural motion, providing a more effective workout than traditional forearm exercises. The adjustable resistance allows you to customize the intensity of your workout, allowing you to push your limits and achieve maximum results. With the Black Diamond Forearm Trainer, you'll be able to take your arm strength and endurance to a whole new level.\n\nFeatures:\n\u003cul>\n\u003cli>112 g (4 oz)\u003c/li>\n\u003c/ul>\n\nSpecifications:\n\u003cul>\n\u003cli>A fixture on gear shifters for more than 20 years.\u003c/li>\n\u003c/ul>\n"