GMC & Chevrolet Bedside Rail System  Integral Rails + Packout Panel Bundle: 2 Integral Rails, 2 Packout panels, 4 Slide-N-Lock Cleats, and everything needed to install.  Integral Rails: This is the first step to optimizing your truck bed. Add this rail within minutes and unlock the endless accessory options that can be added to it.  Two Pack: Comes with two Packout Panels. Left and right side locks are included. Explore other accessory options such as Packout Panels and Track Nuts to add whatever you can think of.  Slide-N-Lock: The cleat system locks and unlocks with the twist of a handle. Unlock, slide to your desired position, and lock it in place. You can change cleat positions within seconds.  More Accessories Coming: The Integral Rail systems will have many new accessories coming soon. Including quick clamps, strap mounts, bike mounts, and many more options.  Bolts directly to the factory, bedside mount holes on 2019+ Chevrolet Silverado & GMC Sierra 1500. Please select the correct bed length.  Features - Integral Rails  .2" thick extruded aluminum rail. Anodized black.  Toggle Bolt System for easy installation.  2 cleats included with each rail  Slide and lock system to easily change cleat positions.  Rust-resistant, coated stainless hardware. Additional accessories available. Features - Packout Panels  Locking system with two keys included.  Left right side locks included in the kit.  11 gauge laser cut steel. Two layers of powder coat. Rust-resistant, coated stainless hardware. Includes track nuts and all hardware to install.  Fitment Bolts directly to the factory, bedside mount holes on 2019+ Chevrolet Silverado & GMC Sierra 1500. Please select the correct bed length. Not compatible with Carbon Pro beds.  Please review the model and bed length options.  Tonneau covers do not affect the fitment.  Does not work with plastic bed inserts without trimming. Spray-in bed liners are okay. Everything needed to install is included, including instructions. Patent Pending Design and specific feature patents pending.