SPECIFICATIONS Certification: CIQ Feature: Eco-Friendly,Stocked Material: Other,Metamorphic rock Metal Type: Metamorphic rock Type: Sharpeners feature: Natural Sharpening Stone Core Selling Points 1️⃣ Natural Material, Ultra-Fine Texture Crafted from premium natural whetstone from China, the fine-grit surface is made of uniform, delicate mudstone (slate) granules. It precisely repairs microscopic blade defects, achieving a "mirror-level" sharpness. Effortlessly slices through bone-in meat or frozen meat! 2️⃣ Professional Precision Grinding The natural whetstone's moderate hardness prevents metal residue and blade damage. Pair with a synthetic coarse stone (sold separately) for optimal results: coarse-grit sharpening removes dullness, while fine-grit polishing triples blade lifespan! 3️⃣ Multi-Use, All-Scenario Solution Suitable for kitchen knives, woodworking chisels, pedicure tools, razors, and more. The natural stone's stability ensures corrosion resistance and a 10+ year lifespan. 4️⃣ Eco-Friendly & Safe Pure natural mineral stone with zero adhesives or additives. Grinding produces minimal stone dust, easily rinsed with water (Baby-safe) design! 🌍 Ideal for ✅ Kitchen Enthusiasts: Restores knife sharpness in 3 seconds, effortless slicing without crushing ingredients. ✅ Artisans: Precision sharpening for chisels and planes, enhancing carving details. ✅ Outdoor Adventurers: Rapidly sharpens axes and hunting knives for rugged environments. 💬 User Reviews 🔥 "Chopping bones feels like cutting tofu! The blade shaves hair effortlessly—way better than imported whetstones!" —@German Buyer 🔥 "The natural stone feels premium. Yellow mud slurry during sharpening proves its durability over synthetic stones!" —@Japanese Knife Blogger Note: due to the manufacturing process, the size may have a deviation of 2-3mm