Premium Quality Finger Exerciser In 3 Degrees Of Hardness. The Handle Is Available In 3 Colors And Range (Yellow Hardness 15 - Red Hardness 20 - Blue Hardness 30). Thanks To The 3 Different Hardness Levels, You Can Perfectly Adjust The Level Of Difficulty To Your Level. You Can Improve The Mobility Of Your Fingers Or Restore The Function Of Your Fingers And Forearms Due To Diseases, Which Will Be A Good Partner For Your Hand Training.Ideal Hand Training Device : Thanks To The Oval Drive, This Hand And Finger Trainer Adapts Perfectly To Your Hand. The Surface Of The Finger Trainer Is Slightly Roughened And Thus Prevents Slipping. This Increases Comfort And The Training Effect. Hand Trainer Kit No Smell, No Stickiness. The Training Eggs Are Washable And Can Be Cleaned Normally With Water After Use, Easy To Keep Clean And Hygienic.Non-Toxic Quality: The Product Is Made Of Environmentally Friendly Thermoplastic Rubber (Tpr) And Retains Its Shape Even With Frequent Use. It Is Non-Toxic And Safe, Specially Designed For Long-Term And Frequent Use. Safe, Environmentally Friendly And Durable.Hand Exerciser Applicable To All People: Suitable For Large And Small Hands, The Elderly And Teenagers. This Hand Exerciser Is Suitable For A Variety Of People, Especially For The Following Sports Activities: Mountaineering, Bodybuilding, Fitness, Tennis, Baseball, Boxing, Golf And Shooting. It'S Also Ideal For Pc Users (Programmers, Writers), Students (Pen Gestures), And Instrument Players (Guitarists, Bassists, Pianists, And Violins).Versatile, Small, And Portable - With These Stress Balls, You Can Relieve Stress, Strengthen Hands, Fingers And Forearms, Increase Finger Flexibility And Prevent Arthritis. Suitable For People Of Different Ages And Professionals. This Light And Small Climbing Ball Is Very Portable. You Can Take Them Anywhere And Train Your Hands And Fingers Anytime And Anywhere.