Efficient Multi-Functional Workout Equipment: This twister arm trainer can achieve multiple functions through different usage methods and action combinations. It can effectively shape the muscle lines of the arms, biceps and triceps, chest, abdomen, shoulders, back and legs. The exercise method of the chest trainer device is simple and easy to learn, suitable for men or women of different ages without professional guidance. It's the best choice for your full body muscle exercise Adjustable Resistance: Our chest workout equipment has 3 adjustable resistance levels. Both beginners and fitness enthusiasts can adjust the intensity and difficulty of equipment according to their abilities and needs. Flexibly adjust according to one's own state at any time to keep exercise at its best Durable, Comfortable Safe Design: This portable twister arm trainer features double precision steel springs with high strength and toughness, strong buffering force, smooth rebound to avoid injury, and a thickened stainless steel inner wall tube to make the overall structure of the chest trainer for men device more stable, capable of withstanding high-intensity training needs and helping you achieve your fitness goals faster 3 Upgraded Protections: The curved handle conforms to the ergonomic design, making it easier to generate force. The elastic foam wrapped handle makes the grip feel more comfortable, sweat resistant, slip resistant, and does not start cocoons. The double refined steel spring is wrapped by a thickened wear-resistant leather sleeve, to prevent skin and hair from being pinched Workout Anywhere: Our arm trainer for men is lightweight and portable in design, making it convenient for you to practice anytime, anywhere in indoor, outdoor, office, travel and other scenarios. It eliminates the hassle of not having time to go to the gym and makes every workout more valuable We offer 1-5 Days Free shipping 30-Days Free returns