Make Your Own Custom Welder's Extension Cord, DIY Style — DIY Welding Plans
120v Extension Cord with USB outlets : r/DIY
Flex Seal - DIY solution to store your extension cords without tangling them up! Long extension cords inevitably tie themselves up into a tangled mess. With this simple project build a home
DIY Suicide Extension Cord (Found on the internet) : r/ElectroBOOM