This is my take on a landscaping spike that you would use to anchor down landscaping fabric or in my case, a mulch barrier/divider.
I didn't think Paying over $1+tax to the big box stores was worth it when I need so many plus I have a 3D printer.
Its a amateur design but I was desperate and gave it my best.
Modeled off of the Vigoro 8 in. Anchoring Landscape Spike. Mines not the full 8" but I don't think its needed as of yet.
In theory, you could print 150ish of these on (1) 1kg spool.
Notes:
Used a brim on the head to help hold it to the build plate.