For 2007+ Toyota Tundra bed track systems. This will not fit earlier Tundra models or Tacoma trucks.Great condition -- less than 1 year old and installed only one time. No box or manual (manual is available on Thule's website)The Thule XK2 Truck Rack Adapter Kit allows the Thule Xsporter & Pro Series pickup truck rack systems to attach to pickup trucks equipped with a bed track system such as the 2007 Toyota Tundra (and newer models). Along with the XK2 Adapter the Thule Pro Series & Thule Xsporter truck racks are now the only multi-purpose pickup truck racks capable of mounting directly to truck bed track systems. Kit includes four XK2 adapters. Allows the Thule Pro Series & Xsporter pickup truck rack systems to attach to pickup trucks equipped with a bed track system such as the 2007+ Toyota Tundra trucks. Easy to install Thule XK2 clamps secure the truck rack to pickup truck bed track system with no drilling required. Long lasting, great looking high strength aluminum construction.