ITEM NAME:1pc Blade diamond Whetstone Polishing Tool Two Sides 10000# 3000# Grit GN`US.1 x Whetstone. The sharpening stone is made from professional grade natural stone, which is quite wearable. Stone is flat for working flat edges, with 2 sides of different grades: 3000# and 10000#. Use the right sharpening side for your stoning work.