We are aware of the rail main role is to Guide the movement of the device and a means to reduce friction. The side rail is one of a class, as he and the other Guides, grooves or ridges are made of metal or other material to withstand the load during exercise. The difference is that from the name "side rails" We can see that he is a square rail, which bear the load is also different from other rail. And also just on a side rail, according to different combinations, slide, slide, such as size, is also divided into different models, technicians in the use of the process, according to their own needs choose a different side rails, so that the work to achieve the best good condition.