Many different people invented different wrenches at widely different times.
There are many kinds of wrenches. Perhaps the most common are open end wrenches. Then you have box wrenches, pipe wrenches, adjustable wrenches, combination wrenches and many others.
All wrenches are steel .
Wrenches and sockets all come in multiple sizes. Which you have depends on the kind of work you do. Most craftsmen have a full set of metric wrenches and sockets and a full set of SAE wrenches and sockets. Most get by with 3/8 drive sockets, but many have 1/2 sockets as well.
Almost all the technicians I can think of use wrenches frequently.
Open end wrench, box wrench, gear wrench.
tambo
There are many kinds of wrenches. Perhaps the most common are open end wrenches. Then you have box wrenches, pipe wrenches, adjustable wrenches, combination wrenches and many others.
Wrench & wrenches
Powermaster Slugging Wrenches / Striking Wrenches have the heaviest construction on the market. Slug Wrenches / Striking Wrenches wall and thickness optimized for heavy impact Powermaster also manufactures castellated wrenches for use on GE turbines. Along with castellated wrench, GE turbine tools like castellated sockets, stack sockets, Striking Wrenches, slug wrenches, podger spanners, slug spanners are also manufactured. Hammer /Hammering Wrenches are available in all metric and inch sizes upto 9 1/4" (230 mm) A/F. Powermaster also manufactures podger spanners or podger wrenches (Structured Wrenches)
monkey wrenches are named appropriately because due to their dexterity they can reach places that we as humans can not.
Socket wrenches are made all over the world.
Anybody who repairs or maintains mechanical things uses wrenches.
Reed is a good brand of hand wrenches.
Allen wrenches are used to tighten and loosen Allen screws.
You mean Stilson, - they are a famous brand of heavy duty wrenches.
Wrenches or spanners are most useful. Sockets are very useful in many cases. I keep complete sets of both SAE and Metric wrenches in my car. along with Allen wrenches of both types. I do have some excellent adjustable ( crescent ) wrenches, but prefer wrenches that fit exactly as I was taught in maintaining aircreft.
Nobody wants to buy used wrenches. I go to a flea market to sell 2-3 times a year and no one ever buys my old wrenches.