... finish prevents chipping, peeling, rust and corrosion. 3.System locks down and squares up frame. tensioning for solid cover anchoring. 4 ... finish prevents chipping, peeling, rust and corrosion. 3.System locks down and squares up frame. tensioning for solid cover anchoring. 4 ... Strength .3.Heavy Duty Grommets . Poly Rope for Main Cover Tie Down .One complete Roll-up Door Kit .4.Protective Plastic Tube ...