The Yakima Control Towers, formerly Locking RailRiders, in conjunction with Landing Pads are quick and easy to install on vehicles with factory racks with tracks. Control Towers snap solidly into Landing Pads (required, see YAK0080) which fit into almost every factory track. Throw in crossbars, and voila! you have yourself a Yakima base rack that carries a full load of gear. Secure your Control Towers with SKS locks, sold separately. **FOR SET OF 4, SEE YAK0079.