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 HTF-6S 6 Piece Hardness Tester File Set

TTC HTF-6S 6 Piece Hardness Tester File Set

Product ID: 258193531

Details

Brand
TTC
Colour
White
Item weight
0.5 Pounds
Power source
Battery
Style
Classic

🎨Color-coded for quick ID

📏6 precision hardness files

🛡️Non-slip grip for secure handling

₨76949

Duties & taxes included

In stock

Sold byAmazon Sri LankaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Master material testing with precision and style!

SECURE HANDLING - Non-slip grips ensure steady control, even in demanding work environments.
TRUSTED QUALITY - Backed by TTC’s reputation and a 4.5-star rating from over 250 users, reliability you can count on.
COMPACT PORTABLE - Lightweight and space-saving design fits perfectly in any professional toolkit or workspace.
INSTANT IDENTIFICATION - Color-coded files eliminate guesswork, speeding up your workflow with effortless selection.
PRECISION AT YOUR FINGERTIPS - Six expertly crafted hardness tester files for accurate material testing every time.

The TTC HTF-6S is a 6-piece hardness tester file set featuring color-coded, non-slip files designed for precise and efficient hardness testing. Compact and lightweight, this battery-powered tool set is trusted by professionals and boasts a strong 4.5-star rating from 257 users.

Specifications

ASIN	B005701LAG
ASIN	B005701LAG
Brand Name	TTC
Color	White
Customer Reviews	4.5 4.5 out of 5 stars (257)
Customer reviews	4.5 4.5 out of 5 stars (257)
Date First Available	6 September 2014
Is Discontinued By Manufacturer	No
Item Weight	0.5 Pounds
Item model number	HTF-6S
Manufacturer	TTC
Manufacturer	TTC
Measurement Type	Hardness Tester
Model	HTF-6S
Package Dimensions	20.6 x 9.91 x 2.39 cm; 226.8 g
Part Number	HTF-6S
Power Source	Battery Powered
Style Name	Classic
UPC	647829664282

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