Sturdy And Durable High-Quality MaterialsErgonomic Aluminum Handle Is Durable And Not Easy To Rust. High Quality Steel Springs Make The Forearm Grip Stronger And Sturdier. The Bodybuilding Grip Braces Are Made With Premium Silicone Material That Is Directly Washable, Odorless And Latex Free. The Non-Slip Rings Are Also Tear And Crack Resistant For Long Term Use.Adjustable ResistanceProviding 5 Levels (50-75-100-125-150 Lbs) Of Resistances, You Can Select The Right Levels By According To Your Specific Needs And Goals, Effectively Improve Your Strength. Suitable For Men, Women, The Elderly And Teenagers Who Have Different Strengths.Built With Non-Slip HandlesEasy To Adjust The Resistance And Use. (Note: No Need To Fully Release The Handles When Adjusting The Resistance, If The Resistance Bar Falls Off The Tube, Please Match The Semicircle Hole Then Reinsert It.)Portable And Lightweight Design Easy To Carry Carry Portable And Lightweight Handle Trainer Design, Easy To Slip Into Your Pocket Or Backpack, You Can Take These Hand Grippers With You And Exercise Wherever You Go. Use Them At Home, In The Office Or While Traveling, Turning Your Free Time Into A Productive Workout.Great For Improving Hand Strength And Rehabilitation Targeting Your Forearms, Hand , Your Fingers And Wrists, These Strength Training Hand Enhancers Are The Perfect Way To Build Hand Strength And Increase Your Grip. The Hand Gripper Strengthener Also Works Great For Rehabilitation And Relief Of Stress, Rheumatoid Arthritis And You'Re On The Verge Of Recovery.