Muscle Building: Muscle pull exerciser is mainly used to exercise and expand the pectoral muscles, arm muscles and back muscles, and is ideal for exercising the upper body muscle groups. .Adjustable Tension: Chest arm expander has 5 removable tension tubes, 1 tube has a tension of about 7KG, you can control the tension of the chest expander by adjusting the number of tension tubes, which can meet different exercise people and exercise needs. .Unique Design: The handle and tension tube are connected by an antler buckle design, which is firm and not easy to fall off, ensuring safe use. The curved handle is comfortable and easy to grip. .High-Quality Material: Adjustable chest expander is made of high quality TEP instead of traditional spring, which has better elasticity and toughness, no rust, easy to stretch and not easy to break, longer life. .Easy to Carry: Chest expander puller can be folded, rolled and disassembled at will without taking up too much space, making it very lightweight and easy to carry and store, allowing you to exercise anywhere, anytime. .