Read more about the condition New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is applicable).

That is interesting but perhaps you could share more information and someone aside from Cliff may have some insight?Most of us using CBN are serious about obtaining the best edge possible and would have to do it anyway.

I would go with the 800 CBN after the Metallic CBN 1K,also if you don't do a lot of sharpening the Venev stones in the lower grits work really well and will last a very long also,just be sure to get aluminum oxide powder to flatten them with.This is more noticeable with lower grits as the abrasive particles are larger, as you move to finer grits you're less likely to see the difference unless you are really looking for it.