Features: ADJUSTABLE: Dial easily adjusts resistance from 22lb to 88lb (10-40kg), you can either increase or decrease level freely, perfect for bodybuilding, weightlifting, wall climbing, and more. BUILT-IN COUNTER: Records number of complete grips and resets easily, convenient to calculate your everyday workout and quickly build your strength to a higher level. SOLID CONSTRUCTION: Solid plastic construction with heavy-duty stainless steel tension springs is built to endure long-term, frequent use and offers users comfy exercise experience. COMFORTABLE: Soft grooves in the grip for maximum comfort and prevents slipping from your hand. Fits most hand sizes, for men, women, seniors, teenagers. PORTABLE: It is convenient to fit into your gym bag or handbag, convenient to train your strength while commuting, at office, home, gym, theater, or anywhere you prefer!