Holds 2 Wago 222-415 5 input power connectors to make a power + ground distribution bus. Screws are at Tetrix widths so it's easy to connect to Tetrix channels. Can also use two of these back-to-back with intermediate wires bridging between the two sets to create an 8-input distribution bus.
Print V13 with no support. I print with 0.25mm layers and 25% infill and it comes out nicely. Haven't tried other layer sizes.