Replaces Standard Railmount Hardware. Allows Toolbox to be installed flush against BackRack(TM). Eliminates gap between Toolbox and Backrack. Allows Toolbox to be installed without drilling into truck bed. Standard 21 inches. Optional 31 inches available. Tonneau Cover Hardware Kit; Low Profile; 2008-2021 Toyota Tundra Trail FX - Hard Tri Fold Access - Tonnosport Retrax - RetraxPRO MX Trail FX - Soft Rolling Access - Vanish Retrax - PowertraxPRO MX Truxedo - Edge American Tonneau - Soft Rolling Retrax - RetraxONE XR Truxedo - Lo Pro Bak Industries - BakFlip Retrax - PowertraxONE XR Undercover - Flex Bak Industries - Revolver X2 Retrax - RetraxPRO XR Extang - Revolution Enthuze - R-Series Retrax - PowertraxPRO XR Extang - Xceed Hard Fold Enthuze - Soft Roll Truxedo - ProX15 Bak Industries - BakFlip G2 Gator - Evo Truxedo - Sentry Bak Industries - BakFlip MX4 Gator - FX Truxedo - Sentry CT Bak Industries - BakFlip Fibermax Gator - FX3 UnderCover - Ultra Flex Gator - FX5 UnderCover - ArmorFlex Bak Industries - BakFlip F1 Gator - Roll Up Series ARE - Fusion Bak Industries - Revolver X4 Gator - Trax RTX - Hard Fold Enthuze - Hard Tri-Fold Low Profile Ionic - Roll Up Gator - EFX Lund - Genesis Roll Up Retrax - RetraxOne MX Tonnopro - Lo Roll Access - Lorado Retrax - PowertraxONE MX, 2008-2021 Toyota Tundra Trail FX - Hard Tri Fold Access - Tonnosport Retrax - RetraxPRO MX Trail FX - Soft Rolling Access - Vanish Retrax - PowertraxPRO MX Truxedo - Edge American Tonneau - Soft Rolling Retrax - RetraxONE XR Truxedo - Lo Pro Bak Industries - BakFlip Retrax - PowertraxONE XR Undercover - Flex Bak Industries - Revolver X2 Retrax - RetraxPRO XR Extang - Revolution Enthuze - R-Series Retrax - PowertraxPRO XR Extang - Xceed Hard Fold Enthuze - Soft Roll Truxedo - ProX15 Bak Industries - BakFlip G2 Gator - Evo Truxedo - Sentry Bak Industries - BakFlip MX4 Gator - FX Truxedo - Sentry CT Bak Industries - BakFlip Fibermax Gator - FX3 UnderCover - Ultra Flex Gator - FX5 UnderCover - ArmorFlex Bak Industries - BakFlip F1 Gator - Roll Up Series ARE - Fusion Bak Industries - Revolver X4 Gator - Trax RTX - Hard Fold Enthuze - Hard Tri-Fold Low Profile Ionic - Roll Up Gator - EFX Lund - Genesis Roll Up Retrax - RetraxOne MX Tonnopro - Lo Roll Access - Lorado Retrax - PowertraxONE MX
