High Quality MaterialsFinger Exerciser Made Of High Quality Silicone, Not Easy To Tear. It Is Also Very Safe, Non-Toxic, Harmless And Environmentally Friendly. The Toughness Is Great, You Don'T Have To Worry About Elasticity Diminishing After A Period Of Training.Fitness And Sports EnthusiastsThis Finger Exerciser Is A Great Beginner Kit To Improve Overall Grip Strength, Recovering From Injury Or Improving Finger Strength. Strengthen Your Wrists, Improve Your Dexterity And Increase The Power Your Hands Can Apply While Reducing Fatigue.Ergonomic DesignThe Strength Trainer Is Ergonomically Designed And Fits Well On All Hand Sizes And At All Ages, Fits Perfectly In The Hand, That Way Your Thumb Doesn'T Feel Too Tight And Your Little Thumb Doesn'T Feel Too Loose, Just Like All Possible Exercises Without Having To Adjust The Device. Training, Brings Better Comfort And More Effective Training.Wide Range Of ApplicationsErgonomic Design Brings Better Comfort And More Effective Training. It Fits All Hand Sizes, Which Is Perfect For Men, Women, Seniors And Teenagers. Especially Useful For The Following Sports And Activities: Mountaineering, Bodybuilding, Tennis, Baseball, Boxing, Golf And Shooting, Etc. You Can Also Take Them To Your Gym, Office Or Anywhere Else.Easy To CarryYou Will Receive 4 Different Color Finger Massager Rings, They Are Mini And Small, Lightweight, Easy To Carry , Can Do Finger Rehabilitation Anytime, Anywhere. Exercise Your Fingers, Hands And Forearms Anywhere, Whether At Home, In The Office, While Walking, In The Car Or Playing Your Favorite Sport.