Hardness Testing File Set

2 years ago

https://www.penntoolco.com/flexbar-hardness-testing-file-set---18750/

The hardness testing file set provides a simple method for determining material hardness, which can be found by sliding the files across the surface of the material you are testing.

The set includes six color coded files, which indicate hardness ranging from 40 to 65 HRC.

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