Item Type: Fitness Equipment Material: PP, Steel Pipe Weight: Approx. 2000g / 4.4lb Package List 1 x Fitness Equipment 1Triangular Lever Mechanical Principle: The heavier the tension on the horizontal bar is, the more compressed the spring is, and the firmer the two ends of the base are against the wall. 2Plug in Lock Design: One key locking is more convenient, that is, the horizontal bar can only be extended in the direction of the rotation arrow, and cannot be shortened. 3Tighten Horizontal Bar: After the mortise and tenon lock catch is inserted, the one way gear lock can play its function, that is, the horizontal bar can only be tightened, not loosened. 4Multiple Muscle Group Exercises: Our home gym bar allows you to perform a variety of upper body strengthening exercises. You also can move the upper body workout bar down to the lower part of the doorway for sit ups, push ups, dips, crunches and even stretching. 5Private Home Gym: You are not necessary to go to gym to waste your time and expensive membershop fee The pull up bar is easy to carry and easy to install. Using the pull up bar is also a good offer to attain your workout results.