What is the Thule Pro Bar for T Slot Tonneau Covers?

What is the Thule Pro Bar for T Slot Tonneau Covers? t slot rails for truck Elevate Rack Systems TS Rails provide the foundation of a multitude of accessory options and allows for full functionality of your truck bed cover--be it a roll triple twister slot The Putco T-Slot Bed Rails have an oval design, which provides the rails with superior lateral strength The t-channel creates flexible mounting options, which

triple twister slot Truck Rack with Two Cross Bars and Four Brackets for Pickup Bed, Universal Aluminum Black Bar Length Adjustable from Min 49” to Max 64” Works with Tonneau Cover

the walking dead 2 slot Pair of Side Rails for the HD Truck collection; Great for attaching LoadStop, T-Slot T-Slot Mounted Loads Stops Integrated tie-down points Up And if you don't see your truck listed They feature a beefy cross section for load stability off-road and have the same T-slot for attaching accessories as