The photo above shows the installed ratchet bar. It is spring-loaded so that it stays tucked up along the inside surface of the bag’s top. The numerous teeth allow the bag to be overstuffed
and still locked.

To lock the bag, the ratchet is rotated down from its stored position and slid into the ratchet bar guide.

The ratchet bar guide shown above guides the ratchet bar into perfect alignment with the lock without actually seeing the lock.

This view is from the inside of the bag looking toward the front. It shows the bag completely closed and locked.

The photo above shows the additional ratchet bar length showing just how much the bag can be over-stuffed and still
locked. The lock is just beginning to engage the ratchet bar as shown here.

The installation is simple and quick. The only visible changes to the bag are the two rivet screws on top of the bag for the ratchet bar, and the two rivet screws holding the lock and cover plate in place.