I still use only sparred file, but I will review it.
I feel defeated by Daiso's triangle file.
The finish is bad and the surface does not pass.
(Although it can be said that Daiso's are too good)
It is speculation, but since the bending is not that much
I feel that the surface undulation is a problem.
(I wonder if it is said that the average roughness is bad)
Then there was intense burr at the tip.
It seems to be on production rather than stamp marks.
Of course it was fixed with diamond file.
Since there is no use, I am thinking whether to correct the whole surface with diamonds.
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