Metal Testing - UT/ Flaw detection / Harness / Pipline locators
Ultrasonic test meters, Flaw Detection, Pit Depth Meters and Weld Gauges, Metal Hardness and Pipeline Locators.
It Won't help with your personality but if you want to check for flaws in welds or steel, these are the most full featured models you can buy for the price. MADE IN THE USA (assuming you want to consider California part of the USA)
Ultrasonic Thickness Gauges for measuring the thickness of steel or coatings over concrete.
Both Portable and Bench top models to test the hardness of most types of metals
Just becasue you can't see them, doesn;t mean you cant find them.