Hand Grip Strengthener,Honbay 3 PCS Set Hand Gripper Grip Silicone Ring Resistance Strength Trainer Exerciser 100% Brand new and high quality Three pieces set,which includes 30lb, 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