This fantastic sharpening stone from Niwaki is specially designed for secateurs, but also great for shears and topiary clippers. The concave edge follows the curve of the blade perfectly, and it's small enough to get into tight spots. Soak in water before each use. Brown #1000 grit: fine, for regular sharpening. Dimensions 13.1 x 2.0 x 2.3 cm.