The X-Trainer is opening new ground to extensor muscle training. Made with FDA grade and BPA free silicone to ensure high durability and sustained resistance and safety. Our product has been tested and shown to be 3x more durable than some competitors. It’s light design allows you to take it everywhere and have it readily available to train anywhere anytime. Working on your extensors will give a boost to your grip strength by improving wrist stability. Also having appropriate muscular balance between antagonists muscles (flexors and extensors) will help you prevent injuries and pain associated to grip overuse (elbow tendinitis). The pack comes with three resistances: 3, 4 & 5 kilograms.
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