A patented vice-like cam-lock secures these innovative tie-downs anywhere along your pick-up truck rail, so your set-up can be customized to fit all your hauling needs. No drilling is necessary and you're not limited by having to use stake-hole pockets. They're constructed of heavy-duty chrome-plated die-cast zinc and lined with a soft cushioning layer of neoprene to guard against scratches and scuffs. Perfect for use with rail caps, campers and tonneau covers. Per pair.