This is 3 x 7/8 x 3/8 Gator 2-sided pocket sharpening stone.

It is new, in original clamshell packaging.

It will not properly fit in US Pilot survival sheaths, as it is slightly long and thick.  Perhaps it would fit after a few sessions of sharpening blades.

Perfect for tackle box or bug-out kits, glove box, tool box, anywhere you might need to dress up the edge on a cutting tool.