Drilling on most trucks is limited to the tailgate only, as the primary attaching means is accomplished with Roll-N-Lock's patented clamp-on track system. Attachment of the tailgate extrusion (tailgate locking closure strip) requires five small, self-drilling screws, which are tucked neatly within or under the extrusion. The Dodge Ram, Ford Sport Trac, and Ford Supercrew require minimal drilling into the down flange of the bedrail. The Ford Flareside is the exception, requiring coupling flanges which are screwed on to the bed rails.