Kiken series does not compose the set of even progression but offers "repository" of premium stones to make a custom stone set

Orion 240 (100%)

We recommend using V-Block Clamp Support to eliminate the flexing of V-Block

Venev Diamonds may have the flatness tolerance up to 0

tsushima natural nagura Kiken series does not composeTsushima Natural Nagura stones are used to create a honing paste on the surface of natural stones in order to refine the grit structure and give the stone a better bite on the edge being sharpened. Tsushima Nagura stones are usable on all sharpening stones from medium to ultra fine grits. They work on artificial stones as well as they do on natural stones. Tsushima Nagura () is mined on Tsushima Island off the coast of Nagasaki Prefecture in Japan.