Strauss Premium Foam Hand Grip, (Blue) and Wrist Exerciser, Black Extremely portable design, you can use it in easily, strength your fingers at any time when you want. Individual finger tension is adjustable, You can select different tensions for each finger, providing all-in-one hand fitness. Durable wrist strengthener and comfort: This wrist strengthener is made of heavy duty carbon steel spring, which is stainless and durable soft and thicken foam minimize hand grip Features dual-action capability perform regular or reverse wrist curls Material: Stainless-steel In-box Contents: 1 forearm strengthner It is designed to improve strength, power and speed in the wrists, fingers and forearms, strengthens and builds flexor and extensor muscles