Extang Revolution Roll-up Truck Bed Tonneau Cover | 54355 | fits Chevy/GMC Canyon/Colorado (6 ft bed) 2015-18 An Incredible Roll Up Tonneau Cover With A Revolutionary Design Automatic Tension Design For Quick Latch And Go Operation Provides A Stylish Near Flush Fit Side Rails Are Pre-Drilled for Quick and Easy Clamp Placement Automoatic Tension System Keeps Tarp Tight And Looking Great