What are the major differences between Aluminum fence and railings compared to a steel or wrought iron product?

Our aluminum product comes with a lifetime warranty as opposed to a 20 year warranty most steel products have. Our panels are assembled by using a punched post instead of a rail end for steel products. These rail ends can be tampered with and provides less security. Our punched post system allows the rail to slide inside the post and fastened with a hidden screw.