Rugged steel construction, durable nylon cord for use with standard discus, this hand wrist exerciser is a special high-efficiency trainer to improve your grip strength and endurance. High strength durability, no deformation, adjustable strap, ideal for heavy weights. Light weight and portable, Perfect for training for all sports and as a rehabilitation tool for hands and forearms; Excellent rehabilitation tool for hands and forearms. Cable will be metal inside pvc cover. Plates not included.