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.\nTonneau Cover Hardware Kit; Low Profile;\n2019-2021 Chevrolet Silverado 1500 Trail FX - Soft Rolling Access - Tonnosport Retrax - RetraxPRO MX Truxedo - Edge Access - Vanish Retrax - PowertraxPRO MX Truxedo - Lo Pro American Tonneau - Soft Rolling Retrax - RetraxONE XR Undercover - Flex Bak Industries - Revolver X2 Retrax - PowertraxONE XR Extang - Express Enthuze - R-Series Retrax - RetraxPRO XR Extang - Revolution Enthuze - Soft Roll Retrax - PowertraxPRO XR Extang - Xceed Hard Fold Gator - Evo Truxedo - ProX15 Bak Industries - BakFlip G2 Gator - FX Truxedo - Sentry Bak Industries - BakFlip MX4 Gator - FX3 Truxedo - Sentry CT Bak Industries - BakFlip Fibermax Gator - FX5 UnderCover - Ultra Flex Gator - Roll Up Series UnderCover - ArmorFlex Bak Industries - BakFlip F1 Gator - Trax ARE - Fusion Bak Industries - Revolver X4 Ionic - Roll Up RTX - Soft Roll Enthuze - Hard Tri-Fold Low Profile Lund - Genesis Roll Up RTX - Hard Fold Gator - EFX Tonnopro - Lo Roll Retrax - RetraxOne MX Trail FX - Hard Tri Fold Access - Lorado Retrax - PowertraxONE MX ...See Application Guide for Additional Fitments
