Aluminum material, sturdy steel construction, powder coating finish Wide, slip-resistant / non-slip steel steps Completely self-supporting structures and have two rigid castors and two swivel casters with brake making them easy to move Operative can have one hand free when moving up and down the steps and both hands free with a large top level platform PU casters 4" * 4, can be customized in other sizes and other material (nylon, rubber, etc) Increase productivity with speedy relocation Ideal for working at fixed heights, easier to maneuver than scaffolds or lifts Waist-high guard rail around work zone Extra-large standing platform for long standing comfort Perfect for Use in warehouse (for safe order picking), DIY Hardware store, stockroom, maintenance areas, various types of factory, schools, offices, hospitals