DH knows about the grit/honing stuff and he said don't worry about the grit flaking off until the blade was honed down to nothing. That's how long this diamond carbide stuff holds up. I ordered the 6-1/2in x 18-1/2 and the 4-1/2in x 8-1/2. I think it is great to have one product perform two different useful tasks. That will save me money over time.