An adjustable wrench is a wrench with an adjustable jaw, allowing it to sized to the fastener head that it is tightening or loosening. A main domestic use is with plumbing fixtures, either to tighten or replace them.
These are for use on nuts where you don't have a wrench of the correct size. Adjustable wrenches are very handy, but can 'round' tight nuts if you are careless. Most technicians use them only as a last resort.
For getting off nuts that people don't have the real wrench for. Many north Americans still can't get used to having metric sizes and i can count on one hand my friends who have, for instance, a 13 mm wrench !
The tool you probably saw was a plumbers wrench. It uses and adjustable metal band to tighten pipes.
A monkey of course! Seriously, a monkey wrench would probably be used mostly by plumbers but anyone could use one as you would use an adjustable wrench. A monkey wrench came along with the original tool kit that came with your new model T or model A Ford way back when. The inventors name as CHARLES MONCKY( that's where the name for the wrench came from
My dad uses a wrench.
The Craftsman Torque Wrench is a wonderful tool to help with the maintenance of one's car. This wrench insures you will get a good grip on the bolts in your car, without ruining anything.
There's a world of difference. A torque wrench is a hand tool used to tighten fasteners to a preset torque specification. An impact wrench is a power tool which uses power actuated hammers to tighten a fastener for high torque applications.
I think that uses a 7mm Allen wrench.
Plumbers use them
It is plumbing or plumber.
Almost all the technicians I can think of use wrenches frequently.