Double-sided aluminium oxide stone for medium and coarse grade sharpening. Sharpens all types of tools and knives. Ideal for bench-mounted sharpening. Can be used dry or lubricated and cooled with water. Size 200 x 50 x 25mm. Double-sided aluminium oxide stone for medium and coarse grade sharpening. Sharpens all types of tools and knives. Ideal for bench-mounted sharpening. Can be used dry or lubricated and cooled with water. Size 200 x 50 x 25mm.