Advantage-Enhance aerobic exercise to build up your upper body muscles step by step,muscle of back,muscle of abdomen,arm muscle. Design-The frame is chromed. All parts are connection firmed. Steel diamond grain handles are covered with black tape, feel comfortable and fit when used. Two 360 degree rotating stainless steel circles are not rusty. Working principle-Firmed frame ensures the steel circles can horizontal straight line rotate,prevent deformation and concentrate strength. Suit for many Occasions-Professional boxers, extreme athletes, rehabilitation training, fitness enthusiasts,etc. Two Sizes: 8 pounds /12 pounds Two Colors: Black/Sliver › See more product details