Ballymore invented the rolling safety ladder and continues to lead the industry in innovating and introducing new products to the market. What are the major features and benefits of Steel, Aluminum, and Stainless Steel? Steel Ladders: For all around general purpose. Very rugged and economical. Aluminum Ladders: Non-magnetic and non-sparking. Paint-free for pharmaceutical & food applications. Aluminum mill finish with industrial grade welds. Also ideal for wash-down applications. Stainless Steel Ladders: Type 304 Stainless Steel construction. Ideal for wash-down and corrosive environments. Bead blasted finish. All stainless steel ladders are manufactured with industrial grade welds. Not recommended for Clean Room applications.