Bestop 19212-01 EZ-Roll Tonneau Cover for 2007-2013 Chevy Silverado/GMC Sierra Crew Cab (won't fit Classic body style; w/o bed management system), 5.8' 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