This Double sided Japanese Whetstone is the perfect Bonsai Tool Sharpener for all flat edged bonsai tools. The coarse #250 Grit side is great for getting even the bluntest tools back to a sharp edge by allowing you to remove any small nicks and chips, while the #1000 side is great for maintaining a sharp edge for general use. Made in Japan, KING waterstones are one of the leading sharpening stones used by top chefs all around the world. The KING K-80 Combi is a Popular compact sharpening stone for general tools and basic knives. Its dual grade surfaces are well suited for sharpening Bonsai Tools, both Stainless Steel and Carbon Steel. The 250 grit is more coarse, allowing you to get back to a useable edge faster and is great for all round sharpening of tools that can become particularly blunt and chipped, including Root Scissors, Root Cutters and Branch Cutters. The 1000 grit side is fine enough to keep a great sharp edge for regular bonsai use. Perfect for trimming scissors and shears. Always use this sharpening stone with water. We recommend soaking in water for 15 minutes, prior to use. (K-80) (K80) KING Sharpening Stone – A perfect Bonsai Tool Combination Sharpening Stone. Dimensions – 205 × 50 × 25mm – Double sided #250 #1000 grit.