Hand Grip Exerciser improves hand, wrist and forearm strength. Brand new adjustable hand exerciser, 15 and 50kg (33 to 110 pounds) Adjustable resistance to allow various levels of difficulty and building of strength. Resistance is adjusted by twisting the knob. Soft hand grips make the product comfortable to use. Ideal for anyone looking to build strength and/or muscle mass in their wrists, hands and forearms.