Pass-through in furniture for cable (cablesunk/grommet/cable gloryhole/cabeldurchführung) RJ45 ready

Sometimes you want to run a wire through a shelf in your closet, but if your shelves are made of particleboard, the hole will be unsightly and sawdust will fall from it. It's even worse when you need a large hole, such as for an RJ45 plug or multiple cables. I made a simple plug model that slides into a 25mm hole and snaps into place, no glue required.

For the holes you will need a 25mm diameter multi-point wood drill bit (or forstner drill).  You can find it by searching for "Wood Drill Bit 25mm". The models are named something like "CK T2943-25 25mm", "C.K Fast4 Wood Drill Bit 25mm".
I'm attaching links to examples of such a drill bit so you know exactly what to look for:
https://www.amazon.com/4inch-Shank-Woodworking-Fluted-Auger/dp/B07PR4BY7Z
https://aliexpress.ru/item/1005005974108721.html

https://www.vseinstrumenti.ru/product/sverlo-forstnera-26-mm-vira-rage-552013-1166260/
https://www.wildberries.ru/catalog/13112233/detail.aspx
https://www.ozon.ru/product/sverlo-forstnera-26mm-s-shestigrannym-hvostovikom-vira-rage-168342485/