Q Towers are Yakima's answer to racking cars and vehicles without raingutters. The Q Towers rest on a soft rubber pad which sits on the edge of your car roof. Q Clips, which are designed specifically for each vehicle, fasten into the edge of your door jamb and into the Q Towers for a tight, custom fit. The snap down clamping mechanism allows for easy installation and removal of the rack. Roundbars and Q Clips are required and may be purchased separately or as a package . Locks are recommended but not included with this rack.