Troy Products offers 2021 Chevy Tahoe Eco cargo mount is custom made for the half-width Eco Storage Box, part numbers SB-ECO-2D-2635-GP. Three (3) elevated brackets included and punched with holes to mount storage drawer. It is fixed and is not adjustable. Simplify your installation with this innovative TROY mounting brackets. Designed and engineered for the perfect fit. Proudly made in the USA.