Using Three Pins to Measure Larger Holes

[extropic]

Content in the linked thread explains how to accurately measure hole diameters larger than any single pin you have on hand.

Using three pin gauges to extend measurement range

I could not resist getting a gauge pin set…0.061 to 0.250 covers a good range that snap gauges can’t. Edit: these are minus sets, no bigger than the stated diameter, no smaller than two tenths under.

www.hobby-machinist.com