This will be a (too soft) one use and bin file...
I have a Dunlop fret file, now Gurian, since more than 30 years. To me, and loads of pro luthiers, it's the best available, not cheap at all. It will last forever, it comes with 3 different burrs (for narrow, medium and jumbo frets) and you can buy these burrs back if ever needed. I think it's the only one with that special feature. It's a 3 in 1 file covering all types of frets.
https://www.allparts.uk.com/products/gurian-fret-crowning-file-set