Niwaki Sharpening stone #1000Fantastic sharpening stones, specially designed for secateurs but also great for shears, topiary clippers and other sharp stuff. #1000: fine, for regular sharpening the most useful stone for regular sharpening: if you only get on stone, make it this one The bottom of each stone is slightly concave and designed in such a way that it fits the convex curve of the cutting blade perfectly on all our secateurs. This makes it easy to get the angle of attack