Magnetic support for material during laser cutting
Can take materials up to 13mm thick

These are the pieces to print and the quantities:

Screw.stl (1pcs)
This part requires a round magnet with a diameter of 15mm and a thickness of 3mm.

Nut.stl (2pcs)

I personally printed the parts in PLA with 20% infill and 0.2mm layer height , and I have to say I didn't encounter any problems.