The TranzSporter Solar Panel Saddle Carriage by Tie Down Safety is specifically designed for lifting heavy solar panels with ease to the rooftop for the TP400. This TranzSporter ladder hoist part makes your job easier and safer. The unique saddle carriage allows the panels to roll off the hoist easily for simple transportation of the panels to the rooftop. The design fits up to four solar panels or plywood sheets. Tie Down Safety maintains high standards and quality controls using quality raw materials and component parts made in the USA.