I use it to smooth the ends of all gauges, from 30 to 10, they all fit. A few drags back and forth and wire ends are smoothed out. A few more drags while twisting, it's rounded nicely. Enough drags carefully aimed and you'll have a nice sharp pin. Beats cup burrs all to pieces for the kind of work I've done thus far...
This little baby was under $3 at Academy Sports and well worth the trip to find it. Here's a link directly to the page on Lansky's website, with video -
Bluddy Blogger won't let the link work, let's try this - [click here]
If the link breaks AGAIN, try searching the Lansky website for fish hook sharpener and look for this style. You want one that is a sharpening stone with V slots, not metal coated with diamond dust. That dust wears off and then you are left with a useless chunk of metal.
There have been reports of finding it at independent fishing shops and on Amazon.