If you keep your entire collection 3 mm thick

Do not soak Norton Waterstones stones in water

Turkish Oilstone was mined on Crete island in Greece

For grits above F800

venev centaur series dual side resin cbn 6 x 1 Grit:240 + 400 If you keep your entireVenev Centaur Series Dual Side Resin CBN are used for sharpening knives on Hapstone, TSProf, and all Edge Pro compatible guided sharpening systems, as well as freehand sharpening. CBN (Cubic Boron Nitride) is the second hardest material after diamond. CBN sharpening stones offer excellent performance in sharpening knives of any steel. Centaur Series is dual side sharpening stone with two 1 mm thick CBN bearing layers on the aluminum plate. CBN layers