are the files iso 9001 certified.

No tools are ISO 9001 certified.

Can I have the pdf file in english? Also is this good for crystal/rock hardness?

I can't answer about the pdf but the files are calibrated for Rockwell hardness for metals, not Mohs scale for rock.

is the writing on the tool itself english or japanese?

Our tool is in Japanese. But we can send you a simple English document on how to use this tool in PDF.

Are these files good for measuring the hardness of soft steel such as hot or cold rolled or only good for tool hardened steel?

The files only go down to 40 Rockwell C, so they won’t give you any information on mild steel. They can tell you if a hardenable steel arrives with any prehardening, meaning you have to temper it before machining.

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TTC

Product ID: 258193531

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Details

Brand
TTC
Power Source
Battery
Style
Classic
Color
White
Item Weight
0.5 Pounds

📏20.57 x 9.91 x 2.54 cm

🔋Battery powered

⚖️40.8g weight

Description

🔍 Unleash Precision with Every Test!

TRUSTED BRAND QUALITY - Rely on Travers Tool Co., Inc. for professional-grade tools.
COLOR CODED CONVENIENCE - Easily identify files with a vibrant color-coding system.
NON SLIP GRIP FOR CONTROL - Achieve accurate results with a secure, non-slip grip.
PRECISION AT YOUR FINGERTIPS - Experience the ultimate in hardness testing with our TTC6 file set.
COMPACT DESIGN FOR PORTABILITY - Take your testing on the go with a lightweight and compact design.

The TTC6 Piece Hardness Tester File Set is a compact and convenient tool designed for professionals seeking accurate hardness testing. Weighing only 40.8g and featuring a non-slip grip, this set is color-coded for easy identification and is battery powered for ultimate portability. Manufactured by the trusted Travers Tool Co., Inc., this file set is perfect for on-the-go testing without compromising quality.

Specifications

Item Weight	40.8 g
Package Dimensions	20.57 x 9.91 x 2.54 cm; 40.82 g
Manufacturer reference	HTF-6S
Color Name	White
Power Source	Battery Powered

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