This grip strengthener is a great way to increase the strength and speed of your wrists, fingers, and forearms. It is perfect for rock climbing, tennis, golf, baseball, basketball, football, swimming, boxing and other sports. This forearm strengthener is made of premium material, Polypropylene, spring material is premium steel 65Mn, and the silver ring is made of stainless steel. It has a sturdy and comfortable grip, and the soft Thermo-Plastic-Rubber on the handles ensures a comfortable grip when in use. This hand grip trainer is suitable for both large and small hands, seniors, and teenagers. It can help to improve the strength of your wrist, fingers, and forearm, and also help to relieve stress and improve blood circulation. The ergonomic design of this grip strengthener makes it easy to use and comfortable to hold, and it can be used at home, in the office, or while traveling. This grip strengthener is an excellent tool for strengthening your hands and improving your overall hand strength and dexterity.