Perforated square tubing is cost effective choice of manufacturing square sign post and telescoping square tubing, which provide easy installation and savings in time and labor cost. One prominent advantage is its unique telescoping feature. Smaller sizes fit smoothly and snugly into the next larger size, which is possible by the help of high-frequency resistance welding. Road signs, warn signs and billboards are amounted to the tubing back-to-back.

Square perforated tubes are fabricated with a wide range of hole sizes and wall thicknesses for the application of mechanical and structural. Galvanized steel and aluminum alloy is the frequent used metal alloy. They can hold much more weight than wood or plastic tubes. In addition, owing to its special structure, it is easy to replace old broken tubing.