Atago stones may have slight natural imperfections

Black - ultra-fine grit range for finish sharpening and honing

Mathematically verified radial-convex shape of the outer surface allows you to set the sharpening angle of only 7

Upgrading capability is the most important feature of Zhuk knife sharpeners

Debado stones are preliminarily lapped and do not require lapping after purchase

gunny glide graphene lubricant Scent:Clover Atago stones may have slightGunny Glide is a revolutionary graphene h BN based lubricant designed to work on all surfaces. Graphene and hexagonal boron nitride are two dimensional one atom thick materials. Graphene, a single layer of carbon atoms, is 200x stronger than steel and has more lubricity than any single material known. Graphene when suspended in a lubricant and applied to a surface will burnish itself to that surface. It not only fills any pores or defects in a surface