I'm mostly rocking Nicholson and Black Diamond files (plus some older Swiss--mostly my small files) from anywhere from the '50s-90s. They all still work great. I mostly use single-cut ******* files (or flat *******)--for axes. Most are still pretty decent, but a few (the big ones) are a little dull--so worth sending those off?
Also--who makes decent ones today? I've always been told to buy Pferd. I've not been impressed by any of the Nicholson or Kobalt files I've bought off the shelf. However, my Nicholson farmer's file is one of the newer Made In Brazil models, and I regularly use it on my axes since it's got a handle built-in.
Decent current file makers.
Tome Feteira of Portugal.
Vallorbe of Switzerland. (They make larger files, but the smaller jewelry and watchmaking sizes are usually what are easily findable in the USA).
Corradi of Italy.
Tsubosan of Japan.
There may be others.
There is also one major conglomerate in India that makes hand files, that may make decent files, especially since a crapload of manufacturing in India likely is still done with files.
The conglomerate is called JK Superdrive, and owns a number of file brands, and slso purchased all the file making equipment from MOB Talabot, the French equivalent of Nicholson, and the manufacturer that had likely been making the files for Facom.
The conglomerate that owns the file works is large, and involved in a number of industries.
The file brands are “Sunflower”, “Three Files”, “Two Tusk”, “Two Files”, “Premium Scissors Steel Files”, “JK Uno”, “MJK”, “Rock”, “JK Cleveland”, “HFL Hindustan Files”, “JK Superdrive”, “JK File & Tool”.
I have no clue if any of the brands are made to a higher standard than others.
Plenty of major tool brands now supply Indian made files, which are quite possibly made by JK.