Enables driver to see the cargo mattress to assist with fifth-wheel or gooseneck hitching, or to briefly Test on cargo. Silverado 1500 shown. The “saltbox” roof fashion (originally from New England) adds some added flair to this storage shed. Doorways are put on the front wall of your Saltbox shed, https://duramaxshed64197.wikihearsay.com/2840145/the_smart_trick_of_sheds_that_no_one_is_discussing