Tradewinds HD-C4111AC-H is a commercial grade/heavy duty fabricated steel equipment that is designed for both surface mount and portable use. It features a back bench and both rod and round perforated design. Assembly should be done on a clean, flat, solid surface with a drop cloth, allowing plenty of working room. All parts are precut and pre-drilled, and it is recommended to leave all bolts and nuts “finger tight” until the entire unit is completely assembled. This allows room for movement to level or adjust all seats, tops, benches, framework, and braces if necessary.