a type of caliper using the vernier scale, an extremely precise measuring instrument
A slide-type graduated instrument used to measure overall cartridge and case lengths precisely
A measuring instrument consisting of an L-shaped frame with a linear scale along its longer arm and an L-shaped sliding attachment with a vernier, used to read directly the dimension of an object represented by the separation between the inner or outer edges of the two shorter arms
Precision measuring instrument with a vernier scale mounted on its movable jaw Used to make accurate internal and external measurements in thousandths of an inch or hundredths of a millimeter
A short graduated scale that slides along a longer graduated instrument and is used to indicate fractional parts of divisions, as in a micrometer