1. Used for measuring the bore, bore slot and other difficult to measure internal dimensions.
2. The dial to rotate ± 170 degrees, convenient numerical reads.
3. Power, starting value of the displayed value is the absolute measurement, digital display analog display, analog display resolution may automatically switch.
4. Analog display range: ± 20.
5. Metric, imperial measurement mode switch key.
6. Memory maximum, minimum, or keep the displayed value.
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