Composition: Highly compressed siliceous shale from the Hon-Kuchi Naori geological formation

Clean or rinse after use

All imperfections are exposed

Arkansas stones do not require any preparations

aluminum oxide soft dressing stone f9 Grit:320 Composition: Highly compressed siliceous shaleBoride Aluminum Oxide Dressing Stone is a maintenance stone for cleaning, refreshing, flattening, and resurfacing sharpening stones in 6" x 1" Edge Pro form factor. It uses White Aluminum Oxide abrasive with Boride vitrified bonds F9 and G9. It provides controlled resurfacing and routine maintenance with lower risk of excessively roughening the stone surface. Compared to Silicon Carbide versions, it works more gently and leaves a smoother refreshed