This is a remix of the 1u 6 inch raspberry pi rack. It uses a 5v power brick as a source, and has 5 5.5 x 2.5mm outputs each one controlled by a switch and 3mm LED. The switches are the cheap generic SPST toggles on amazon or ebay ( https://amzn.to/2wgRFkV ), and 2.5 x 5.5 mm jacks ( https://amzn.to/2wnOMiu ). Screws are #6 x half inch. I use it to distribute power to some PI's and nodemcu ESP8266's. For the pi's I use 2.5mm to micro USB adapters connected to 2.5mm double ended dc power cables (see pic of the pi for cable and adapter).

I've made a few remixes of the original 1 and 2 u designs. The 2u fits a smartthings hub perfectly and the 1u's I use for pi's (pbx server, blynk server. vpn server, and dns server esp8266's and power distro.