A terminal block for up to 4 bare wires (22awg ~ 14awg) to be connected to a low voltage source. How much current and voltage would depend on which plastic you print and the quality of your bolts as well as the gauge of your wire of course. I've been using it to power a 1`2V LED light and fan. For legal reasons I cannot claim it is safe to use. For indoor use only. It is designed to be screwed down to a surface horizontally. The lid is designed to sort of snap on, but it may fall off it mounted upside down or vertically.
Video to show how to build it; https://www.youtube.com/watch?v=WdyY32Qa2tk
What you need;
4 M4 nuts that fit a 7mm wrench
4, M4 screws x 10mm
14awg bare copper wire x 80mm
As you can see in the pictures, you could use it in two ways. You can use the bare wire as the feed and have 4 terminal connections, or you can cut the bare wire short to not protrude and have 3 connections with the remaining connection your feed.