Easy to use system that fits most one-piece and two-up seats. It attaches under the passenger seat area to allow the use of sissy bar, rack or seat bags without a sissy bar or rack. Two-piece design enables the yoke to fit a variety of seat widths Security straps, D-rings and spring-loaded hooks ensure stable mounting Adds considerably to the amount of potential luggage a bike can carry without modification Mounting for two-up seats