If you want to get a super strong grip then you need to train the “crushing function” of the fingers. This movement strengthens every major muscle in the hands and forearms, and will also build finger strength through a full range of motion which is very important for complete development. The Super Gripper is the ideal tool to get started and take your hand strength to super human levels. This is an old school device that gets real results. This hand strength trainer is perfect for maximum effort training, endurance work or a combination of both.