Rating: - sharp stuff
I have always carried a knife in my pocket, and after losing 3 to TSA jerks, I almost got out of the habit. I dug up an old swiss amry knife, and began to work the dull blade. Using various sharpeners, I ended up with a decent blade. Then I got teh diamond whetstones. Wow. Like magic. Truly a great way to get an edge on your stuff.
Rating: - Can't go wrong with DMT
I've used these stones before, and they work so well I finally decided to buy one. Like most stones they are a bit expensive, but there isn't anything that will substitute. I bought the fine grit, but will likely buy the medium and coarse some day. Just not today. One at a time makes the "bite" not as hard on the pocket book as buying all three at one time.