The Grindstone Mk2 is perfect for rock climbers who want to improve their grip strength and endurance. Its asymmetrical edge layout ensures equal spacing between each edge size, so you can train your fingers individually or as a group. The custom edge profile eliminates specific pressure points, allowing you to focus on training with one, two, three, or four fingers at a time. Plus, the versatile design means you don't need designated pockets to get a great workout. 

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