- Quick application: Integrated 4-step sharpening process with universal compatibility, enabling an effortless transition from basic sharpening to precision refinement for optimal cutting performance. - Easy to use: Non-slip handle geometry with an ergonomic shape provides fatigue-free sharpening and supports one-handed operation, making it age-friendly and suitable for beginners. - Efficient cutting renewal: Precisely restores original sharpness with fine grain for mirror-smooth surfaces and coarse grain for edge shape correction. Double-sided whetstones optimize cutting performance sustainably and are suitable for different cutting tools from kitchen knives to craft tools. - Multifunctional in use: Knife care for all common blade materials, boosting workflows in food preparation and kitchen organization. - Use scenarios: - Home kitchen: sharpen daily-use kitchen knives for clean cuts and safer handling during meal prep. - Craft tools: maintain chisels and carving knives for precise, controlled work. - All-purpose maintenance: suitable for all common blade materials to keep kitchen and workshop tools organized and ready.