Perfect upper body training tool, train arms, chest, shoulders, back and the entire upper body. Can also be used as a hand trainer. High quality: elastic high-strength spring, durable. With steel pull rod and non-slip high-density PU handle, very effective for building your body. Ergonomic design: Ergonomic handles provide a comfortable grip and effectively prevent the hand from slipping. Adjustable: There are five springs that can increase or decrease the number of springs depending on the firmness required by the individual. Suitable for all types of people: Perfect for adult men and women of all fitness levels; Build muscles, melt fat and get a perfect figure. Have you encountered the following problems? - Your chest muscles hinder your progress at the gym. - You want to say goodbye to weak arms and flat chests forever. - Do you want to use the chest expander for strength and the resulting effects on sports / strength training? It only takes time and at a reasonable price and then you can have strong arms and beautiful chest muscles. Now use our chest and arm expander to build muscle strength anywhere in your arms, chest, hands, wrists, fingers and forearms. You will always look more beautiful with the chest enhancer. Our expander is practical for home, office and when traveling. Features Color: Black (as pictures show) One piece per weight: 700g Size: 55*12cm Material: Steel spring