The Smith's 4-in-1 Knife and Scissors Sharpener can improve the edge of a wide variety of blades. The crossed carbide blades are preset to provide quick, consistent edge setting. The coarse, 600-grit ceramic stones are shaped to create a razor-sharp edge for either serrated or standard blades. Both the carbide blades and the stones are reversible and replaceable for extended use. The sharpening steels provide precise edge alignment, and the scissors sharpener handles both right- and left-handed scissors.