There are several versions based on the files chosen, each uses a couple 6mm long M5 threaded inserts and m5 strews with hex heads. The weighted base uses 6 washers. These are ID 0.500" OD 1.125" Thickness 0.055" to 0.069" (92141A032 on McMastercarr)
You will need one of these light sockets: https://www.amazon.com/GutReise-5V-USB-E14-Decoration/dp/B0BJVRC3NP/
The author marked this model as their own original creation.