Lionel FasTrack Siding Track Pack Add this track pack to your existing Lionel Ready-to-Run O-Gauge set to create a layout with an interior siding Changes your 40 x 60 oval of FasTrack to a 39 x 70 layout Includes three 10 Straight Track sections, one Uncoupling Track, one Earthen Bumper, and one Quarter Curve track section Easy, snap-together locking mechanism for sure connections Patented center half-pin allows for track orientation in either direction without the need for moving pins from one end to the next