For vehicles with flush railings. These load carrier feet for the Thule Evo roof rack system intall easily onto vehicles with flush railings. The torque limiter key indicates when the rack is safely and properly secured to the vehicle. The key stores inside the foot. The feet fit Thule WingBar Evo, AeroBlade, SquareBar and ProBar. They are lockable with Thule One-Key locks (sold separately). Maximum load is 75kg but make sure to check the roof load capacity of your vehicle. Sold in 4-packs.