[Durable Construction]: hand grip strengthener is made of Aluminum material and designed with ergonomic handles.Strong compressing spring and the reasonable gripper construction make the whole product more . [Metal Grip Strength Trainer]: Great for enhancing hand strength & rehabilitation. and enhance strength, endurance, dexterity, muscular tone, fine and gross motor skills of your hands, , wrist and forearms, perfect for people who have Arthritis, Tendonitis, Carpal . And also suitable for musicians, athletes, golfers, rock climbers and tennis players. [Grip Strength Trainer Set]: Pack of 3 , 100lbs, 200lbs and 3000lbs. 3 different weights 3 training levels,The 100 lb is doable. The 200 lb is challenging; while the 300 lb is insanely difficult. Got these to strengthen your grip now. [Lightweight And Portable]: Easy to fit in your pocket or backpack, you can take hand gripper with you wherever you go.You can do workout anytime you with these hand Grip Strengthener. [Perfect Item for Daily Strength Training]: Forearm strength Trainer is great for climbers, weightlifters, athletes or all men and women, seniors, kids looking to hand strength. You can enjoy exercising during work or . Exercise your hand anywhere and anytime. color:Silver Material:aluminum Package Contents: 3 x hand grips Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.