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TLDR: Calipers are a tool used to measure the dimensions of an object. They come in different types, including vernier, dial, and digital calipers. They are used in various fields such as engineering, metalworking, woodworking, and medicine.

Calipers are instruments that are used to measure the dimensions of an object. They work by placing two movable points of the instrument across the object or span to be measured. There are many types of calipers, including those with a ruled scale, a dial, or a digital display. One common type is the vernier caliper, which uses a sliding vernier scale for more precise measurements.

Calipers can be as simple as a compass with inward or outward-facing points, but with no scale. The tips of the caliper are adjusted to fit across the points to be measured, and then kept at that span while moved to a separate measuring device, such as a ruler.

Calipers are used in various fields such as mechanical engineering, metalworking, forestry, woodworking, science, and medicine. They are versatile tools that can be used to measure the internal or external size of an object, as well as depth measurements. They are especially useful when measuring over large distances.

There are different types of calipers, including inside calipers, outside calipers, divider calipers, oddleg calipers, vernier calipers, dial calipers, digital calipers, and micrometer screw calipers. Each type has its own specific use and advantages.

Inside calipers are used to measure the internal size of an object, while outside calipers are used to measure the external size. Divider calipers, also known as compasses, are used to mark out locations or measure distances on a map. Oddleg calipers are used to scribe a line at a set distance from the edge of a workpiece. Vernier calipers, dial calipers, and digital calipers are more advanced types that provide precise measurements with different ways of reading the result. Micrometer screw calipers, also known as micrometers, use a calibrated screw for measurement.

When using calipers, it is important to apply them properly against the part to be measured. The accuracy of the measurement depends on the skill of the operator and the amount of force used to make contact with the part. Calipers can be calibrated or uncalibrated, and it is important to check for zero error and recalibrate if necessary.

In summary, calipers are versatile tools used to measure the dimensions of an object. They come in different types and can be used in various fields. Whether you're measuring the size of a metal part or marking out locations on a map, calipers are a handy tool to have.

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