B&P Liberator Convertibles. They are assembled with the same rivets used to attach kins on airplane wings! A Liberator Convertible is made stronger and last longer than any other truck in the industry -- Guaranteed!Five Crossbars on the Senior with a logo channel and four crossbars on the Junior with a logo channel for more frame support. Additionally, this helps prevent smaller boxes from falling through.One-piece, heavy-gauge steel lock bar prevents premature wearing.Wheel brackets are constructed of non-cracking, high-strength extruded aluminum.Two-Year warranty and a lifetime warranty on the axle brackets!