Don't get too much envy - the whole set cost me £25, If I was going to be using them as general metal files I'd have stayed well clear, but I figure they will work just fine on saw plate, wood and the occasional bit of brass.
The general plan is that they will be used for making profiles for a scratch stock, with the odd bit of use elsewhere.
I now, probably, need to make a moderately decent looking scratch stock instead of the random bits of clamped wood that I normally use.