Brummel-hook guard fitting to the Brummel-hook at the speedbar.
its purpose is so that the speedbar does not accidentally detach that easily.
Works well, and quick print.
Attach the model to the wingside-brummel-hook before attaching speedbar-brummel.

Slide over the metal-part part prior to attaching/detaching the speedbar. (see picture),

then slide "down" to "lock" position when speedbar is attached.

Recommend PETG/ASA filament, since it will be used outdoors.

its originally designed for a 0.4 mm Nozzle and 0.2 layer-height