Do you know, that… ?

on the sheet metal there is an operation Hook and slot allows you to add a performance in one venue, and in the second, notches.

Tabs and slots facilitate the welding of parts, but also allow to strengthen the connection thanks to the mutual locking of several sheet metal objects.

The feature is available for all parts, not only sheet metal parts. However, a condition for use is this, that the objects must be disjoint. It can also be used for single objects, multiple and parts in the context of the assembly.