Bestop 19146-01 EZ-Roll Tonneau Cover for 2005-2018 Nissan Frontier Double Cab (w/and w/o utility rails), 4.9' bed Automatic tensioning system keeps fabric taut and smooth Factory-style pull-tab releases at both rear corners for convenient operation Adjustable mounting clamps allow easy installation directly to bed with no drilling more tools Features black aluminum rails and weather-resistant premium-grade fabric Integrated cross-bed fabric supports for smooth appearance