Feature: Increase your grip increase your lifts. Excellent for building forearm strength. Works great for increasing speed, strength and power in the wrist, hands, fingers and forearms. Excellent recovery & rehabilitation tool for arthritis, carpel tunnel, rheumatoid arthritis, tendinitis, post surgery, tennis elbow, wrist sprains and broken fingers or wrists. Ergonomic & ambidextrous design makes it suitable for men women, seniors, teens and pre-teens, and children, depending on age. 1. For long-term Internet users, single-hand workers, young people, and elderly enthusiasts, it is recommended to use 100 pounds (100/150/200/250LB) for basic muscle recovery training. 2. For general gripper practitioners and ordinary young people with hand strength, it is recommended to use 150 pounds and 200 pounds for daily lifting training of arm strength and grasping power. 3. For professional grip practitioners, wrestlers, weightlifters, and strong players, it is recommended to use 250 or 350 pounds for impact training of arm grip. Package Content: 1X Heavy Grips