BACKRACK by RealTruck | Hardware Kit for use w/ 21" Toolbox, Black, No Drill matching with 1999-2006 Chevrolet/GMC Silverado/Sierra 1500/2500/3500; 2007 Silverado/Sierra 1500/2500/3500 Classic

FITMENT | suitable with 1999-2006 Chevrolet/GMC Silverado/Sierra 1500/2500/3500; 2007 Chevrolet/GMC Silverado/Sierra 1500/2500/3500 Classic Toolbox is secured to the Toolbox Brackets by drilling sheet metal screws through the toolbox and into top of the bracket Clamp hooks that come with Toolbox are not required Not appropriate with tonneau shield adapter brackets Drill and bolt is acceptable