These are clips to hang string lights like holiday lights. They are attached by screws for wood eaves on a house but could be used anywhere you don't mind screwing into.

The holes for the screwhead, shaft and countersink are designed for #6 screws of any length.

The square block object is an installation tool to help you install them at a consistent depth from the edge and to maintain a perpendicular angle. Could install with it but it seemed to make things a lot easier for me.

Monoprice

Maker Select Plus

Yes

No

.3mm

100%

The clips were printed in a sideways orientation.

I didn't print with a raft but with a Brim. On my printer at least, the clips would tend to pop off during the printing process due to having little surface area to give purchase to the printing bed.