This Double sided Japanese Whetstone is the perfect Bonsai Tool Sharpener for maintaining all flat edged bonsai tools and creating super sharp edges on specialty tools like grafting knives. Made in Japan, KING waterstones are one of the leading sharpening stones used by top chefs all around the world. Although the KING PB-04 is a Popular Butcher, Chef and Knife sharpening Stone, its dual grade surfaces are well suited for sharpening Bonsai Tools, both Stainless Steel and Carbon Steel. The 800 grit side is great for all round sharpening of Bonsai tools including Root Scissors, Root Cutters and Branch Cutters, while the 6000 grit side is fine enough that you should be able to take the hairs off your arm once your done. Perfect for trimming scissors, shears and grafting knives. Always use this sharpening stone with water. We recommend soaking the stone in water for 15 minutes prior to use. (PB04) KING Combination Sharpening Stone – A perfect Bonsai Tool Sharpening Stone. Dimensions – 185 × 63 × 25mm – Double sided #800 #6000 grit either side with plastic case.