The bypass option is made available on one track. It is never an easy job to install a double-track bypass kit. Sometimes the clearance you have is not enough, sometimes the gap between the two doors is too large, and sometimes it just feels frustrating to put all the pieces together. Now, with our single-track bypass option, installing a bypass kit has never been easier. You can just follow the steps for a standard double-door kit and replace the regular hangers with the bending ones. Features This is a single-track bypass, one track hangs 2 doors, so the wheels will create an 8''-12'' overlap, so please make your door bigger than your opening, the 2 rollers will be hit together when one door slides, maybe drive the other door slides. The distance from the top of the door to the ceiling should be at least 6 inches. Includes rails, rollers, rail spacer, doorstop, truck cover, floor guide, and hex key All assembly hardware is included as you see in the pictures *doors are not included. Fit for door panel thickness: 1-1/2" to 1-3/4". If your door thickness is not within this range, please contact us, and we will provide suitable bolts. Packing List: Track; Roller; Spacer; Floor guide; Anti-jump pads; Door stopper; Connector. only the hardware and door are not included.