Type - underrail - for an easy combination with our hardtops and covers. The upper edges are simply put over the platform fold. This leaves space for the standard clamp fitting of the truck bed cover. Made from an especially break resistant ABS plastic and with an excellent computer designed fit. The thought out fitting, which creates hollow grooves and hollow spaces in between the tub and the vehicle sheet metal, allows for optimal shock absorption, protection of the sheet metal, and an excellent breaking strength. Drilling into the vehicle is not necessary. With tail gate section and material for mounting. For the Ford Ranger Extra Cab ex 2012.