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The BackRack low-profile drill hardware kit for 2007+ Chevy and GMC Silverado/Sierra HD trucks is made to mount a 21-inch toolbox at bed-rail height and requires drilling two holes through the top of the bed rail. The kit secures the toolbox with four carriage head bolts to allow a low-profile installation using existing toolbox clamps. Not compatible with tonneau cover adapter brackets.
BackRack 2007+ Chevy/GMC Silverado Sierra HD Only Low Profile 21in Drill Hardware Kit
