Fangrui Product Details Strengths Musclesbuilds Up Strength In Your Fingers, Wrists, Elbows And Forearms.adjustable Designperform Regular And Reverse Wrist Curls With The Adjustable Stabilizer Padquality & Comfortthis Wrist Strengthener Is Made With Heavy Duty Carbon Steel Springs And Thick 10mm Foam Stabilizer Pad (in Comparison To 6mm) For Extra Comfort And Cushionportable & Lightweightsmall Size, Light Weight, Easy To Carry And Is Free From Any Restrictions. Finger Stretchers & Hand Grip Made Of Healthy And Environmentally Friendly Silicone Material, No Smell, Soft And Comfortable.multi-userock Climbing, Golf, Tennis, Bodybuilding, Guitarists, Drummers, Pianists And Many More.if You Have A Few Spare Minutes, On The Phone Or At Your Desk, Then Its The Opportunity To Strengthen Your Wrist And Forearm. A Few Minutes Per Day Is All That Is Needed To Start Seeing Results.sizingweve Designed Our Wrist & Forearm Trainer To Fit Most Hand Sizes, For Both Men And Women.it Is Suitable For Hands Up To 3.8 Inches (10cm) Wide Across The Knuckles.we Stand By Our Productweve Used Superior Materials And Craftsmanship For The Construction Of Our Wrist & Forearm Trainer.from Our Heavy Duty Carbon Steel Spring That Wont Lose Strength, To Our Foam Padding That Wont Wear Out Or Change Shape. Our Trainer Wont Let You Down.- For More Resistancemove The Stabilizer Pad Towards The Handle For More Resistance.- For Less Resistancemove The Stabilizer Pad Towards The U Shaped Foam For Less Resistance.technical Details- Material: Rubber, Steel Spring- Color: Black- Size: 10.5 X 5 X 1.3 Inches- Weight: 16 Ozif You Feel Uncomfortable To Use This Gear, Please Stop Using It And Don't Use Your Force Blindly.