8-150mm Telescoping Gauge set 6pcs internal gauge for Quick inside measurements

-Measuring range: 8-150mm or 5/16 "to 6"

-Set: 6pcs / set

-Under uniform spring tension, the plunger of the gauge expands from the center to the diameter of the hole or width of slot being measured and then locks in place by a knurled knob.

The hole size is then found by measuring over the two-contact point with a micrometer or caliper.

The telescoping gauges are used to measure internal diameter or internal through-groove of the machined part by a comparative method.