Black Mountain Products Hand Grip Strengthener is a premium product to provide resistance to help develop the muscles in hands, wrists, and forearms. Hand exercise grippers are a great addition to your home gym for developing hand strength for improved function in weight lifting and endurance in sports. Our handles are made from high quality aluminum and with a durable spring. Each hand strengthener is designed with anti-slip design for maximum grip. Black Mountain Products hand grippers will be a long-lasting exercise tool that you can rely on.