Perfect upper body trainer, train your arms, chest, shoulders, back, and entire upper body. Can also be used as a hand trainer. : elastic high-strength spring, durable. With steel coil pull-up bar and non-slip high-density PU handle, very effective for building your body. Ergonomic design: Ergonomic handles provide a comfortable grip, effectively prevent hand slip. 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 muscle, melt fat, and achieve a perfect figure. Have you encountered the following problems? - Your pecs are preventing your progress in 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 just takes time and at a reasonable price, and then you can have strong arms and beautiful pecs! Now use our chest arm expander to build muscle strength anywhere in your arms, chest, hands, wrists, fingers, and forearms. You will always look more beautiful with the breast enhancer. Our expander fitness is practical for at home, in the office, and when traveling. Properties: Color: Black One piece per weight: 700g Size: 55*12cm Material: Tahlfeder