The MC15R Cycle Dock self locking clamp allows one person to load and unload a motorcycle in a trailer, pickup truck or on a service lift. The pivot mechanism uses the weight of the bike to hold itself upright, leaving your hands free to secure the bike. Use the supplied mounting rails to mount the Dock into a trailer or pickup truck. The rails mount to the deck so you can slide the Dock out freeing up your truck or trailer for other uses. The kit includes two m ounting rails. Sold Each. Note: Tie-Downs recommended but not included.