Handshake Amplifier Muscle Training for Home Gym Sports Training Blue 40 to 50 Pounds Description: High quality: The hand exercise grip rings are made of the highest quality silicone, suitable for gripper, stretching and pulling. The non-slip rings are also tear and crack resistant for long-lasting use. Perfect size: 8 cm/3,15 inch, ideally suited for grip strength training for men, women, seniors and teenagers. Muscle training rings provide resistance and fill the hand. Grip Amplifier: Strengthens wrists, improves finger dexterity, and increases hand strength while reducing fatigue. Hand gripper 2 in 1. Help balance your grip muscles and expanding muscles. Easy to carry: Suitable for all ages and fits well with all hand sizes. Portable compact design and easy to carry in your bag or pocket. You can use it at any time while traveling, in the office or anywhere. Widely used: ideal for athletes (tennis, basketball, boxing, golf and rock climbing) and musicians (guitarists, bass players, pianists and violinists), computer workers. Specification: Material: silicone; Size: 8 cm/3.15 inch The package includes: 1 exercise device with handle Note: