Clear 3M dual lock strip adheres to interior or exterior glass, metal, painted surface, vinyl, or plastic. The rack snaps into the strip, and 250 mushrooms per" positively lock into place for holding power. Not affected by heat, cold, moisture or terrain. Strong and continuous holding removable mount eliminates need for screws or bolts or permanently altering your vehicle. Adjustable, neoprene covered aluminum hooks bend easily to fit any item; velcro straps tighten to prevent movement and wear. Removable radius reducer included to hold gun barrels and small radius items.