Strauss Wrist Exerciser, Black and Adjustable Hand Grip Strengthener, (Grey/Black) MATERIAL - Strauss Forearm Exerciser is made of a spring-loaded steel core, covered with a soft foam. LIGHTWEIGHT EQUIPMENT - We made the forearm/wrist exerciser with iron and ABS plastic. It is lightweight for secure storage and convenient use as a home gym workout equipment. SWEAT-ABSORBENT FOAM HANDLE - The handles come with a sweat-absorbent, soft foam padding, giving you a comfortable grip experience while protecting your safety EASY-ADJUSTABLE RESISTANCE - Easy to adjust the resistance from 10 kgs-40 kgs as needs. The hand Gripper is suitable for everyone, like Athletes, sports, fitness, musicians and people who want to exercise their hand, wrist and fingers. DURABLE & ERGONOMIC DESIGN - With Strauss hand grip , you could train your hand at any time. With high quality and soft materials and, our Hand Grip Strengthener will make your exercise more comfortable and safe.