4-in-1 system for intuitive operation - Automatically adapts to different blade shapes with a controlled grit transition, simplifying the sharpening process. Easy to use - Non-slip grip geometry and ergonomic design enable fatigue-free sharpening, including one-handed operation. - Particularly beginner- and senior-friendly, making knife maintenance accessible to a wide range of users. Precision sharpening - Fine-grain sides deliver a polished, mirror-like finish, while the coarse-grain side reshapes and refreshes the edge. - The double-sided sharpening stone ensures efficient restoration of the optimal cutting edge and consistently sharp results with every use. Everyday reliability - Compatible with ceramic, carbon, and stainless steel knives. - A practical solution for maintaining sharp performance in both household and professional kitchen environments. Use scenarios - Home kitchen: keep daily chef’s knives, paring knives, and specialty blades sharp for smooth, safe slicing during meal prep. - Professional kitchen or catering: maintain consistent edge quality during busy service, reducing downtime. - Culinary schools or training environments: simple, reliable method to teach proper sharpening and knife maintenance.