A.G. Russell Knives

From the Manufacturer:

"A Diamond Whetstone™ sharpener that travels with you.  Folding handle protects the stone when not in use.  Lightweight and ultra portable with a handy key chain swivel ring for your keys or to attach to zipper pulls or backpacks."

Features a unique polka dot sharpening surface with an extra fine 1200 Mesh (9 micron) grit.  Measures 5-1/2" open and 2-3/4 closed.

DMT® Diamond Mini-Sharp® Sharpener