Knafs - Mini Pocket Knife Sharpener - Diamond Stone, Two-Sided Grit - 600 (Fine) and 400 (Medium)

perfect to fit in a wallet or something else. really compact but practical.

Small, lite sharpener for your pack. Very well made, excellent value. HIGHLY RECOMMENDED!

At first, I was disappointed with this abrasive tool. Even the "fine" side is MUCH coarser than the fine side of the corborundum stone that I have always used. In my opinion, it will be impossible to get a sharp edge on a knife using only this tool. What I did find out, though, was that it was very useful in establishing a good, flat basic edge shape. I had not been able to do this very well with the stone. Using this tool, the fine side of the stone, and then a leather strop with abrasive, I was able to get well-shaped razor sharp edges. For that first step, it was well worth the price and will be used often in the future.

This is a great way to keep your EDC knife sharp. It is about 3 inches long and fits nicely into my notebook.

Excellent tool

Decent size for a glove box or pack. Hopefully it breaks in and loses the grit contamination, and clumped up particles.

Update: I reached out to Knafs and without any questions they sent me a new sharpening stone. This be one is perfect, and Knafs prices once again their customer service is priority. So if you're looking for a pocket on the go sharpening stone, this is a great one. So this seemed like the perfect tool for on the go sharpening needs. It was compact, lightweight and had both a course and fine surface for sharpening. I own a number of Knafs products and have universally loved them. But this sharpening plate in particular has a flaw, that is perhaps only a problem on mine. On the fine side of the sharpener there are a number of rough spots, and one in particular (attached picture) that basically makes the fine unusable. It would seem the QC missed this and now this piece is useless as all it does is mar the edge because of the jagged piece sticking out. Unfortunately I purchased this for an on the go knife kit and didn't try to use it until my 30 day return window was up. Oh well, hopefully they can fix their QC on these.

Permanent piece of my truck kit, works great and it's just the right size for my set up