5 Training Devices: Equipped with an adjustable hand trainer, finger strength training, finger tensioners, training ring and stress relief grip ball, which target different hand muscle groups, can improve the strength and mobility of your fingers and hands. Adjustable Hand Trainer: The adjustable hand trainer is continuously adjustable from 5 to 60 kg and is therefore very suitable for beginners, advanced users, fitness, strength training, gymnastics, mountain biking and climbing. Ergonomic design: The ergonomically shaped handle and the additional training device for the fingers and forearm are particularly comfortable and safe in the hand and guarantee perfect, slip-free handling! Safety and high quality: thanks to the use of particularly high-quality materials and super-strong steel springs, our finger trainers have a longer lifespan and are safer.