Bolt, screw, etc... sizes

I live in an appartment, therefore lol, I have to travel many ways… to get a place to work somewhere on the car, and usually only on sunny and beautiful days as today was.

I go to a parking lot of a coin car wash in the middle of no where, where there’s no body and it’s all blocked off by surrounding uninhabited buildings. I’ve seen others do the same sometimes. I enjoy working there… So each time I need tools, wherever I am, I want to know which ones exactly, as opposed to unecessarily carrying tools I do not need.