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A lot of you build engines so I thought we'd post this here. We started looking at .0001 Dial Bore gauge selection and didn't really find anything good that was priced right. So we fixed that with the new $169.99 SUM-900041-01 Gauge. It's made by the same vendor that does our .001 gauge that gets good reviews and we've sold that one for years. This one has has 12 anvils to measure anything from 2 to 6 inches. I checked out the action of the indicator and it's very nice and repeatable. No Mahogany box unfortunately, but the red plastic one is sturdy.