Traditional Spiral Staircase tread pattern is available in mild steel, aluminum and stainless steel and can be incorporated in all kit and fully assembled units. Very classy design, with traditional style patterns cut out on the top, front and radius of the step, give this spiral staircase step exceptional 3 dimension aesthetics. Whether you are trying to blend in with a rustic style home, or just bring your spiral staircase to life, the traditional style pattern is a step above.