Product Type: Adjustable Hand Grip 2 rubberized grips Squeeze together to work the hand muscles, tendons Resistance provided by a heavy duty spring Can be adjusted using a twisting knob Suitable for all ability, strength levels Removable foam grips Strengthens forearms hands, fingers Ideal post-injury or for general grip strength Readjust as your performance improves Pocket sized, easily portable, suitable for daily use Ideal for travel Material: Metal