Lionel FasTrack Accessory Activator Pack Includes one 10 Insulated section and two 5 Isolated sections Offers greater flexibility in designing your layout 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 Two terminal sections under each piece of straight track for transformer and/or accessory power connections no Lockons required