YY Vertical Alien Finger Resistance Trainer - 2 Pack

YY Vertical Alien Finger Resistance Trainer - 2 Pack Perfect for rehabbing an injury or helping you to balance the differences in tension between your fingers flexors and extensors, the Y&Y Aliens come available in 3 different resistances and help to improve your grip strength, better your precision and train your endurance. Difficulties: Green - Easy Blue - Medium Orange - Hard Pack of 2