Calipers

Calipers are used to take inside, outside, and depth measurements not requiring accuracy to a thousandth of an inch. Typical usages include measuring valve springs, pistion diameters, and bearing thicknesses. A graduated steel beam contains a fixed jaw with a sliding scale.There are two types of calipers available for use in automotive repair: vernier and dial. Either one may be capable of displaying both English and metric measurements.