Hosco Double Edge Nut File

Used these for a long time now and they still work well. I mainly use them on Tusq nuts.

I can sometimes experience that the file starts to grab and jam when the slot gets very deep. This is not really a fault of the files. When the slot gets too deep one needs to file away the top surfact of the nut. Then the files work great again.

I have had so many nut files sets before, this is the one staying on my workbench. The grip is great, they cut perfectly - nice round bottom shape on the channels - plus they don't take much space since each has to different gauges. Just be aware to not accidentally flip it around when slotting a nut!
Highly recommended!