Bestop 19218-01 EZ-Roll Tonneau Cover for 2014-2018 Chevy Silverado/GMC Sierra 1500 & 2015-2016 2500/3500, 8.0' 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