Parametric cover for through-wall wire hole

Parametric cover for a holes you may drill for mains wires through table tops, cupboard walls and so on.

The idea is that you may need a fairly big hole to enable the plug the go through. Which would leave a big, ugly and impractical hole, unless you cover it up with this artifact. It consists of two rims with threads, which screw together to neatly cover the hole that you may have cut with a circular saw. Thread the wires with plugs through, and finally add the covering plug from the top.