Calipers: How Thick the Wood; How Wide the Pipe

Many times it is is important to know the size of some unlabeled object.
Usually a good tape will work.
But sometimes a calpier is easier to use.

There are many expensive ones.
But the inexpensive plastic alternatives can be useful.
They are easy to carry and can be shared or lent with no worries.
I have purchased them for less than 1.00

This is 3/4 "
The cali[per shows it a little thinner; it is an inexpensive one

A pipe would be a more typical object to measure.
It is a 2 1/2 inches

Again, this is not a typical object to measure.
A pipe would be a more typical object

It is 2 1/18

If you need great accuracy and precision, get good ones.
If you do not, get some cheap ones.
They do come in handy.