This model can be used to hold plenty of necklaces and other jewelry on one hook and therefore using more of the 3d space near to your wall.
Reducing the gap length also allows to form pockets to hook hangers or to store tiny objects.
These hooks require an insert-empty of the original design to connect to the HSW grid.
In Fusion360 you can modify the parameters of these hooks to suit your needs. Just note the difference between the parameters of bottom and side hooks:
If you are interested in 1 big gap for your hook, look at the base model of this one.
The author remixed this model.
Changed the gap design to allow to have multiple gaps.