Description: 【High Quality】The hand exercise gripping rings are made from premium silicone, suitable for Gripper, stretch, and pull. The nonslip rings are also torn and crack resistant for long term use. 【Perfect Size】9x7.5x2cm/3.54"x2.95"x0.79", Perfectly sized for grip strength training for men, women, seniors, and teens. The muscle training rings offer resistance and fill your hand. 【Grip Strengthener】Strengthen wrists, improve the dexterity of your fingers and increase the strength your hands can apply while reducing fatigue. The hand gripper helps balance your grip muscles and your expanding muscles. 【Easy to Carry】Suitable for all age groups and fits well for all hand sizes. Portable compact design, and is easy to carry in a bag or pocket. You can use it anytime while traveling, at the office, or anywhere. 【Widely Used】Ideal for athletes(tennis, basketball, boxing, golf, and rock climbing)and musician (guitar players, bass players, pianists, and violinists), computer workers. Specification: Material: Silicone Size: 9cmx7.5cmx2cm/3.54inchx2.95inchx0.79inch Package Includes: 1 Hand Grip Exerciser(4 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.