For a long time now I’ve been using various end wrenches when I want to change the nozzles on our Prusa i3s or our powerspec ultras. I was watching a YouTube video and saw a 3-D printed tool that one user had. (I can’t remember who it was or the channel or I would attribute the idea to them). Their tool was fully 3-D printed and they mentioned that it needed to be reprinted every two or three nozzle changes due to melting. I figured I could come up with a solution that wouldn’t need to be reprinted so often. So I created the knob and in the center of it placed a quarter inch socket attachment. I then purchased a couple of husky sockets in each size and epoxied them in place. The two STL’s I have provided have been specifically sized for the husky branded sockets in the link below.

3/8 inch socket at Home Depot https://www.homedepot.com/p/Husky-1-4-in-Drive-3-8-in-6-Point-SAE-Standard-Socket-H4D6P38/202911781

7mm socket at Home Depot https://www.homedepot.com/p/Husky-1-4-in-Drive-7-mm-6-Point-Metric-Standard-Socket-H4D6P7MM/202911900