You can use Duonio during strength and power training to significantly improving the strength of your fingers. You can vary combinations of finger pairs to train two-finger grip or even train individual fingers. Train with Duonio you reach two main goals: increase the strength and power of your fingers and raise your fingers' potential. Moreover, by progressive overload training, you will increase your overall grip and forearm power endurance. You can use Duonio for warming up before the main climbing training session, for special fingers' strength and power training or for rehabilitation (finger-lifting mode).