Vernier Caliper with Fine Adjustment

What is a Caliper?
A caliper is a device used to measure the dimensions of an object in a precise way.
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The Different parts of the Caliper and their functions :
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1. Outside large jaws: used to measure external diameter of an object (like a hollow cylinder) or width of an object (like a rod), diameter of an object (like a sphere).

2. Inside small jaws: used to measure the internal diameter of an object (like a hollow cylinder or pipe).

3. Depth probe/rod: used to measure depths of an object (like a small beaker) or a hole.

4. Main scale (Metric): marked every millimeter and helps to measure length correct up to 1 mm.

5. Main scale (Imperial): marked in inches