BACKRACK by RealTruck | Hardware Kit for use w/ 21" Toolbox, Black, No Drill | 30119TB | Compatible with 2007-2018 Chevy/GMC Silverado/Sierra 1500; 2007-2019 Chevy/GMC Silverado/Sierra 2500/3500 HD

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 compatible with tonneau cover adapter brackets Drill and bolt is acceptable