This is an extendable panel for the bobbins and spools (sewing).
There are two base-panels with a different number of pins.
The panels heve the size of 150x150x15 mm.
You will need some support to print it (for the gaps on the backside).
The panels can be connected to each other with the connector parts, that should be fixed with glue.
On that sides you do not to connect another panel, the connector tail end parts should be glued in.
You have the option to hang the panel on a wall (there are gaps for srew heads on the back), or if you intend to put it on the desk, you can attach supporting feets.
The pins for the bobbins/spools (three different lenght) are flattend on one side to make it easier to print.
Remember to ensure a good layer-adhesion to the bed (temperature etc.).
Otherwise it will tend to warp.
Glue the panels and the connectors together (I recomment to glue as well the adjacent sides together).
The pins do not need to be fixed with glue - but you decide.
As well the supporting feeds do not need to be fixed with glue, but I recommend it for stability.