Complete carrier for one boat includes four saddles, all mounting hardware, and heavy-duty straps Firmly holds kayak with custom designed saddle that conforms to hull Maximum kayak protection with integrated rubber pad Fits Thule standard and Xsporter load bars, Yakima, and most factory installed cross bars Bow and stern tie downs included May require the use of Xadapt3 (80 MM bolts) on some factory applications. This item will require the use of Xadapt3 (80 MM bolts) on our XSporter (421/422) and Rapid Aero Bars