[jimmontg]

I don't know about the new one, but I have a nicholson file set of Habilis precision files I bought in 1978 and they are still sharp. I have kept them oiled, but the other files from then I have are still mostly doing well except the ones I used a lot on stainless. I think they had a touch of chrome in them and of course the manganese would account for their edge holding.
I have a big 12" bastard nicholson, 5/32 thick that is becoming a knife and a 10" 1/8 that is becoming a drop point hunter too. I've had those files for over 40 years and it's about time to recycle them. I annealed them a while back and it's about time I finished them. Hope they take a good blueing.