ULTIMATE GRIP STRENGTH - Strengthens arms and wrists for in-depth workouts at the gym; train your muscles for better grip strength or rehabilitate your upper limbs after injuries TREAT AND PREVENT INJURIES - These Metal Strengtheners are very effective for both rehabilitation and muscle building. Start with a low resistance Gripper and build up levels as you get stronger and healed. It is the ideal product to prevent RSDs (Repetitive Movement Musculoskeletal Disorders) such as carpal tunnel syndrome, tendonitis, etc. EASY TO USE - Tighten the bars for a few seconds each time or release and squeeze for concentric and eccentric strengthening - you control the intensity of your workout; just squeeze with your fingers for an immediate effect. PROFESSIONAL QUALITY - Stainless steel springs and aluminum handles with diamond engravings for better grip. Plus, every Gripper comes with a comprehensive workout guide to help you maximize your strength and rehabilitation results