Hardness Testing Files - Tsubosan Made in Japan

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Test your knife hardness on the Rockwell C scale with this testing file set. Files from 40 RC to 65 RC are included in a custom-fitted case, along with complete instructions and a conversion chart for Rockwell to Vickers. These high-quality hardness testing files feature specially curved tips for testing internal slots and grooves as well as your knife blank. Color-coded handles labeled with the Rockwell value make selecting the right file simple, and the handles have non-slip grips for ease of use. Show more