Polystyrene ceiling insulation anchor

Anchor for mouting EPS/XPS insulation on the metal wall (garage, hut, ...). Im including the ilustration image, how to use it. Its mounted from inside and fastened by screw 3 or 4mm from outside. Im recommending to use the EPDM or silicone washer to make the mounting hole watertight.
You can use less material using 0.8mm nozzle and 3 wall setting + no top and bottom solid layers (shells) + 0% infill. Print time on 0.8mm nozzle and 0.55mm layer height is 10 mins per anchor.
The price is cca 0.13 euro per piece. If you printing it with photovoltaic energy like me, you can make it cheaper (probably cheaper than the home-center shop).

The stl files are with 3 or 4mm hole for screw/bolt.