"Muscle training: The muscle tension trainer is mainly used to exercise and expand the chest muscles, arm muscles and back muscles. It is an ideal choice for exercising upper limb muscle groups.Adjustable tension: The chest and arm expander has 5 detachable tension tubes, and the tension of 1 tube is about 7KG. You can control the tension of the chest and arm expander by adjusting the number of tension tubes, which can meet different exercise groups and exercise needs.Unique design: The handle and the tension tube are connected with a deer antler buckle design, which is firm and not easy to fall off, ensuring safe use. The arc handle is comfortable and easy to hold.High-quality materials: The adjustable chest expander is made of high-quality TEP, replacing traditional springs, with better elasticity and toughness, no rust, easy to stretch, not easy to break, and longer service life.Easy to carry: The chest expander tensioner can be folded, rolled up and disassembled at will, does not take up too much space, is very lightweight, easy to carry and store, allowing you to exercise anytime, anywhere"