For the mechanical engineer they are great for quickly getting a rough estimate of a material's hardness. I use them to determine how easily unfamiliar material can be processed. They're good for that, but if you need an accurate hardness test, you'll have to spend a lot more money on reputable gauges.
High-Precision Surface Roughness Testing Meter With Ra, Rz, Rq, And Rt Parameters. Range Of 0.05 To 15.0 For More Accurate Roughness Profile Measurements.
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π Enhance Your Gold Testing Accuracy with PuriTEST's Pro-Quality 6x3 Inch Gold Test Stone
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