s r enterprise 150mm Manual Vernier Caliper With Fine Adjustment 0-150mm/0-6"-N Vernier Caliper  (150 mm)

Vernier calipers are used by scientists, engineers and inventors to measure small distances accurately. They can be easily adjusted and read with the headstock of the calibrator or by reading directly on scale in seconds.The on & off button is used to turn on the display. After that, bring the exterior jaws together until they touch, then push the zero button. The distances can then be measured using the digital calliper. When turning on the display for the first time, always follow this procedure.