Hardness Testing Files – TSUBOSAN Japan

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.