Extang 42650 Full Tilt Toolbox Hinged Tonneau Cover - fits Silverado/Sierra (6 1/2 ft) 07-13, 2014-2500HD & 3500HD, works with/without track system Incredible Versatility; Roll Up, Lift Up, or Lift Off! Bridges Toolbox-To-Tonneau For Perfect Fit L-Channel design also provides for rain drainage Fits Most Standard 20 in. Tool Boxes Designed To Be Removed By One Person