1 Bidirectional Spring: This finger trainer uses an advanced bidirectional spring design to provide bidirectional elastic compression for effective finger strength and flexibility. Choose this finger trainer to make your fingers stronger and stronger for any challenge. 2 Material: Made of ABS material with excellent abrasion resistance and compression resistance, it can withstand long time training use without deformation. Whether you are a beginner or an experienced athlete, this finger trainer will provide you with long lasting training support in a stable and reliable manner. 3 Finger Training: The unique design of this finger grip trainer allows you to easily adjust and customise the tension of each finger, enabling intensive training of individual fingers and preventing bias towards certain fingers, providing a customised training programme that allows you to achieve higher training results with your fingers. 4 Comfort: Safe materials for peace of mind and safety in your grip strength training. The grip trainer is designed with ergonomic principles, feels great to hold, not easy to produce fatigue, and provides a comfortable grip. Give your fingers a healthy and comfortable workout and add new vigour to your health and fitness. 5 Multifunctional: Ideal for anyone looking to build and maintain strong hands. Whether you are in the office, at home or on the train, it will help you to fully build the strength of your hands, wrists and forearms. It also has a positive effect on treating hand problems such as arthritis, carpal tunnel syndrome and neuropathy.

What's in the box
4 x Finger Strengthener