One Da Kine roof rack strap (20 feet long) with cam buckle. Can be used to strap multiple boards to a car rack. This strap is long enough to use the single strap method as in video below. Please watch the video to do this safely: Use the single strap method for one board only and only if racks are solid and can't move and buckle and strap are in good condition and strap can not slip. If in doubt always use two straps.