Professional Sharpening System. Includes three rotating India oil stones (Fine, Medium and Coarse grits) mounted on a wedge base. Each stone measures 2 1/2″ x 1/2″ x 11 1/2″. Black ABS base also serves as an oil reservoir and storage case. Comes packaged with 16 oz. bottle of Norton Specially Formulated Sharpening Stone Oil which is safe for kitchen use, sharpening angle guide and instruction booklet.