TTC 6 Piece Hardness Tester File Set

If you have a printer, tape and know how the search engine works, then you know what to do! :)It's functional, that in and of itself adds value for the money. It's small, so the size is great for my work bench area that is already brimming with tools, so the small foot print is also a plus!

Performs as described. Using these hardness files to test hardness of annealed and heat-treated tool steels in my shop. Measures Rockwell C-scale hardness within a few points, not a precise testing tool but is not intended or advertised to test more precisely than plus or minus a few points of hardness. Certainly adequate for my purposes in tool making and woodworking.

note that although the image of the product shows instructions in english, the instructions on the box are actually not english.the tool itself seems fine.the instructions basically say:1- push with the file, don't pull.2- start with the high hardness file and work down until a file skips on the material instead of scraping it.3- the hardness of the material is higher than the current file and lower than the previous file.

Very helpful tool to have around. And inexpensive shortcut to estimating hardness. Good for anyone using steel and needing to make a determination about hardness in the work.

While somewhat expensive, they are much cheaper than an actual Rockwell C hardness tester, and accurate enough for most machine shop needs. They are Japanese made. Use the tip to scratch or dig in to the metal piece in question. If it scratches or just digs in then your metal piece is softer on the Rockwell C scale. Move to the next lower probe until it does not scratch or dig in on your metal piece in question. You have now bracketed the hardness to within a 5 unit range on the Rockwell C scale. The whole process takes about 5 seconds per test range. Highly recommended for when tempering steel to a desired hardness, or when trying to identify the type and hardness of unlabeled scrap pieces.

This hardness test set is great! The instructions are written in Japanese but the set is so intuitive that instructions aren't needed.Well marked ratings on each tool. The tools are really easy to use.

These are pricey, but indispensable if you have different bits of steel laying around and what to tell how hard they are, or want to check the results of your heat-treating. Use is pretty simple, gently scrub the surface with the files, starting at the hardest and moving to the softest. (Going from hard to soft keeps you from wearing out your soft files early.) The hardness of your test piece will be between the softest file that left a scratch and the next step down. People with experience using them say they can usually guess the hardness to within a couple of Rc points by the way the hard file feels when scratching a piece. But even a novice can get within 5 points using these.

Despite what the picture shows, the instructions on the case I received are in Japanese. I spent $13 more than what is obviously the same product because this one showed the instructions were in English.Other than that, the product seems good.

for testing hardness it is quite important ,this is a good reference point to see your parts final quality of harness or reference to replacement to same quality, works well ,i even prooved my brother in law , in snowmobile parts quality of harness

Item came in nice package and was delivered within the timeframe stated. This set of tool is very helpful for checking hardness of parts/ tools in the workshop when a professional hardness tester is not available. The original instruction is in Japanese, but seller also includes a translated copy in English. Very thoughtful.Overall this is a good tool to be had in the home workshop, or for small family-own shops where having professional hardness testers are not practical.

Zuverlassiger Liferant.Sehr gute Qualität.

Connaître la dureté des métaux utilisé, rapide et efficace donne un bon aperçu.

They work as described. Only flaw is the instructions are in Japanese.