Includes four Rapid Towers and four end caps to affix Thule Rapid Load Bars to factory-installed roof rack * Foot pack is slotted to accept aluminum Rapid Load Bars (sold separately) for seamless look * Adjustment tool built into feet, making it easy to tweak and lock down with no external hardware * Rubber-coated steel strap secures foot-to-side-rail * Includes limited lifetime manufacturer"s warranty