For those rug-on-top-of-another-rug decorating situations: This is an anchor designed to secure an area rug on top of plush wall-to-wall carpet. The accordion-style feet press down into the plush carpet while the small pointy tacks stick up into the base of the area rug.
Approx 10cm square. Two outer corners have been removed to enable printing without supports.
Works reasonably well in our rug-on-rug situation.
When laid on the ground without any rug on top, works well as a painful object to step on in the middle of the night.
fine (for the pointy tacks)
Probably best with a plastic that can flex a little bit like PETG, nylon, ABS, or maybe TPU. Using too brittle of a plastic will probably lead to cracking and breaking of the tiny tacks when someone steps on it.
Does not need supports as long as your printer does a decent job bridging.