I'm made from milk but I'm not a drink, I age in the dark more than you think. With or without holes, I'm served with ease, Slice me up, who am I please?

I don't start with E and I don't end with E but I do have a letter. -this is a spin on a classic riddle that comes along every once in a while-

I have cities, but no houses. I have rivers, but no water. I have forests, but no trees. I have roads, but no cars.

I'm not a plumber but I often hold a wrench. I'm not an architect but I often hold a measuring tape. I'm not a mechanic but I often hold sockets. I'm not an electrician but I often hold screwdrivers. In fact, I'm forever unemployed, but you'll still find me holding a hammer, pliers, bolts, nuts, nails, a drill, and more.

Crescent, no moon. Mechanical boon. An extension of hand, when connections won’t move. Assists with the crazy, while spinning in groove. While a monkey does loom, pipes are broken and doomed.