Niwaki Sharpening StoneWhetstone Fantastic sharpening stones specially designed for Secateurs, but also great for Shears, Topiary Clippers and other sharp blades. The concave edge follows the curve of the blade perfectly, and they’re small enough to get into tight spots. These are what Tobisho recommend for their tools, and what Jake now uses for his secateurs. Use the #1000 grit for a few minutes every week to keep your secateurs in top condition 136g131 x 20 x 23mmMade in Osaka, Japan