A Combi-lock is used to lock the rails together when two rail systems are linked. The Combi-lock is always used together with two safety locks to prevent the hoist running out of the rail.

The Combi-lock and the two safety locks cannot be installed in the door opening due to insufficient space. In the room where the room-covering system is installed, the parallel rail closest to the neighbouring room with the single track system, must be installed at a sufficient distance from the wall to leave space for the two safety locks.

The Combi-lock is available with electric or manual operation. In new buildings, for instance, the switch can be built into the wall.

When a room-covering system is linked to a single track system, the single track system must be suspended in order for the two systems to be at the same height.