These diamond sharpeners are the best we’ve found for quickly and effectively sharpening secateurs, budding and grafting knives and other garden tools with a cutting edge. They are also very handy for kitchen knives and scissors. The flat and thin profile makes it easy to sharpen the whole cutting edge.
Just clean with soap and water from time to time. Use dry.
Medium grade is the one we use. It is ideal for garden tools and when cutting edges get a good work out between sharpenings.