Naniwa Super-Stone/Advance Sharpening Stones, Set of 3: 400, 1000, 5000 33-Layer Damascus Precision Edge Technology (PEtec) yields

Precision Edge Technology (PEtec) yields a blade that is 20% sharper with twice the edge retention

so maybe they're on to something here

Features the beautiful off-white "creme" coloured handle

otherwise hairline cracks can appear over time

If you do a lot of sharpening

Naniwa Super-Stone/Advance Sharpening Stones, Set of 3: 400, 1000, 5000 33-Layer Damascus Precision Edge Technology (PEtec) yieldsSet of three Naniwa Super Stone Japanese Whetstone Sharpening Stones: Coarse 400 grit; Fine 1000 Grit, Extra Fine 5000 Grit. Made in Japan. A complete sharpening set, for everything from cutting a new edge with the 400 grit for damaged or very old and dull knives, to honing with the 1000 and polishing, and finally finishing with the extra fine 5000 grit. Stones individually boxed, 21cmx7cm surface (8. 25"x2. 75"). 2cm thick. See individual stones for