The all-thread rod is essentially just a longer bolt that is threaded all the way through. "All-thread" refers to a bolt that is threaded throughout its entire length, allowing for the nut to be adjusted freely. A "hanging rod" is a bolt that hangs vertically. When used horizontally, it becomes a tie rod, also known as a "pulling bolt." The pulling bolt is used to limit the freedom of movement in the horizontal direction of components, such as the thickness restriction of concrete wall formwork. Vertically used, it is called a "hanging rod." The top end of the hanging rod connects to the top structure, while the bottom end hangs down, typically used to tie in ceiling joists, fire sprinkler pipes, and more. The significance of using an all-thread rod is that it allows for the free adjustment of the height of the suspended object.