Spyderco - Square Ceramic Sharpening File Stone Square for Sharpening Small Detailed Tools - 400F1S White

There isn't much to say here. It's a small, quality ultra fine sharpening stone. It'll last for ages if you take care of it. It has worked perfectly to polish metal parts and for trigger components in things that go bang. It's small, but does exactly what I need it to.

I use it as file on metal parts. It works perfectly for my uses.

It is exactly as stated about 1/4" x 4" I think. has squared corners with minimal if any radius. Fine white ceramic leaves a good finish for a final polishing if desired.

Very good stone. The photo doesn't show a square file, but it is in fact a square shape. It's ultra fine so don't use it if you need to do course work. Doesn't need oil like an natural stone. Great if you need to delicate smoothing work.

THIS IS A FINE CERAMIC STONE BIT MUCH TO NARROW WOULD HAVE PERFERED 1/2 INCH WIDE.

Used this to remove the burrs from the inside of a 1911 frame where the trigger bar sits. It a perfect fit.

I enjoy the quality of the product. I wish the width was 1 - 2 mm thinner to get into the tight areas I am deburr. The metal item are not deburr from manufacturer so I deburr with stones and the ceramic rod

The tool is the perfect size to fit in a small tool box for last minute sharpening

Zero issues.