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A caliper (British spelling also calliper, or in plurale tantum sense a pair of calipers) is a device used to measure the distance between two opposite sides of an object. Many types of calipers permit reading out a measurement on a ruled scale, a dial, or a digital display. But a caliper can be as simple as a compass with inward or outward-facing points. The tips of the caliper are adjusted to fit across the points to be measured and then the caliper is then removed and the distance read by measuring between the tips with a measuring tool, such as a ruler.
It is used in many fields such as mechanical engineering, metalworking, forestry, woodworking, science and medicine.

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  1. Mister Bisley

    Accurate dial calipers

    Looking to get a decent dial caliper, hopefully under $50. I know as with everything, you get what you pay for, but I can’t afford Starretts or Mitutoyos. My criteria is non-powered (no batteries), must be reliable and measure within .001” and preferably stainless steel. I was looking at the...
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