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
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Step 1: Check the Thickness of a Piece of Plywood
This is 3/4 "
The cali[per shows it a little thinner; it is an inexpensive one
Step 2: Check the Outer Diameter of a Strainer
A pipe would be a more typical object to measure.
It is a 2 1/2 inches
Step 3: Check the Inner Diameter of a Strainer
Again, this is not a typical object to measure.
A pipe would be a more typical object
It is 2 1/18
Step 4: So Get Some Calipers
If you need great accuracy and precision, get good ones.
If you do not, get some cheap ones.
They do come in handy.