On 2017-12-24 3:44 PM, curt seeliger wrote:
> the fourth file with a tight, ~15 degree
> angle -- a feather file? I've only seen one of these before, and it's well
> used, but for what I do not know. How are these intended to be used, and
> what other uses have folks found for these?

For sharpening the wickedly shaped teeth of Japanes saws. Also useful, I 
understand, for adjusting the screw points of augers. Maybe best done 
after making one side safe.

Don

-- 
"You can tell a man that boozes by the company he chooses"
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The harder they come, the bigger they fall." Ry Cooder