HONBAY Hand Grip Strengthener, Finger Gripper, Hand Grippers, Quickly Increase Hand Wrist Finger Forearm Strength, Perfect for Musicians Athletes and Hand Rehabilitation Exercising 100% Brand new and high quality Two pieces set,which includes 40lb and 50lb hand grippers Material--The grippers are made from premium silicone, the high quality item can strenghten your muscle Sized especially for adult hands, to maximize the benefits of the exercise and ensure a challenging, yet safe experience These rings are great for training athletes, and giving their performance a positive boost