SILENT The ultimate workout machine for men and women on the go. Do your exercises anytime and anywhere because the completely silent operation allows you to strengthen your hand grip and exercise your forearms and wrist without detection. Since your gripper is light enough to bring anywhere and doesn't make annoying squeaking noises that most grippers make, you can use your exerciser at work, on a plane or even in a library without bothering those around you.^ INDESTRUCTIBLE Crafted entirely from thermoplastic nylon and steel, this grip strengthener is built like a tank. Even the adjustment wheel is solid steel. You can strengthen your hands every day for years to come and still be able to pass your Death Grip down to the next generation. You simply won't find a higher quality adjustable gripper anywhere.^ ADJUSTABLE When you lift weights, do you use the same amount of weight every day, or do you adjust the weight up or down based on your workout needs? Why should using a grip strengthener be any different? With the adjustable gripper, you can start at the level of resistance that's right for you and increase the resistance as your grip strength improves. Don't limit your progress by using the same level of resistance day in and day out. Welcome to the future of grippers.^ SAFE Focus on strengthening your grips without worrying about accidents. The resistance of the Death Grip is generated by COMPRESSING a solid steel spring. Other adjustable grippers create resistance by STRETCHING the spring, which can be dangerous. Stretching a spring places extreme tension on the components holding the spring in place. These components often fail, resulting in dangerous flying debris and metal shrapnel. By compressing the spring, we've eliminated this risk altogether.^ After-sales-If you have any questions about our products, please contact us in time.