This **Edge Pro Matrix 4000 polishing stone** is used as the last step in the sharpening process with an Edge Pro sharpening system. Use this sharpening stone to polish your knife edge to a razor-sharp mirror shine. This stone is therefore not suitable for sharpening a blunt knife.
## Edge Pro Matrix vs Edge Pro Polish Tape
This F4000 grit polishing stone is a resin-bonded, diamond-coated sharpening stone. In terms of grit size, this sharpening stone is comparable to a J10,000 grit Japanese sharpening stone. According to Edge Pro, the lifespan of the Matrix sharpening stones is significantly longer than the Edge Pro polishing tapes. In addition, these sharpening stones have a more potent polishing effect.
## Grit size of Edge Pro sharpening stones
The sharpening stones in the Edge Pro Sharpening system seem coarse when compared to Japanese sharpening stones. This is because various scales are used for the grit size of sharpening stones. An Edge Pro F400 grit is comparable to a J700 Japanese sharpening stone. And a 1000 grit from Edge Pro can be compared to a 2700 grit Japanese stone. When you consider that you can polish with tapes with an Edge Pro 6000 grit, you’ll understand that the sharpness you can achieve is unparalleled. There is still some guesswork in knowing what the exact similarities are, though. In any case, the Edge Pro stones are finer than you might initially think.
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