The MINI - JOMY has one or two simple manuel opening latches. The latches can be protected by a padlock, restricting use to authorized personnel only.
Safety guardrails are not available.
The ladder is internally counterbalanced by springs for soft deployment when using the opening latches, and for easy closing after use.
On the first picture you see a sketch of the patended opening mechanism of the JOMY and on the other pictures the simple opening latch of the MINI - JOMY. You can see that the mecanism for the JOMY is complex, for the Mini-JOMY it is just a latch.