The ideal complement for the X-Trainer extensors training. The F-Trainer focuses specifically on the mechanic of grip and the activation of flexors muscles. It is fabricated 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 makes it portable and easy to carry and its ring shape allows you to not only work on a palm grip, but also on a pinch mechanic to focus work on finger strength. The pack comes with three resistances: 3, 4 & 5 kilograms.
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