Lives Up To Spyderco Motto
If you use flat whet stones to sharpen blades, you will love this series of sharpening stones from Spyderco. The Medium passes for Fine on most stones, yet does an excellent job of imparting the initial bevel to your blade.
You use these dry, so there is no messy cleanup from spilled oil or water splashes to worry about. The ceramic material is more aggressive than it appears it should be, but it is not as quick as a diamond sharpner. If your blade is only moderately dull, just a few strokes is all you probably need to get you started on an incredibly sharp blade. For some uses, this is all you will need.
For greater sharpness, follow the Medium with the Fine stone. The surface for the Fine block resembles a really high grade honing stone. If you are touching up a blade that is already reasonably sharp, again, just a few strokes should do the trick. When done, your blade will probably be at factory new sharpness.
For the best cutting edge, finish by...
Not flat and virtually impossible to flatten
I bought this stone and it was decidedly concave. If you put a straight edge on it and looked at it sideways you could see a lot of light coming through the middle. I called up Spyderco and was told to return it. I did that - and they sent it right back to me with a little note saying it was within their tolerances.
not lapped as stated
These stones are supposed to be lapped flat, yet the very first time I put metal to it, saw marks were evident on both sides. The stone could not have been properly lapped flat if concentric, parallel ridges and valleys from the saw are still present.
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