4-in-1 sharpening system with automatic adaptation to different blade shapes and a controlled grit transition for consistent results across various knives and tools. Ergonomic, non-slip handle for easy one-handed operation. Designed for comfortable use by users of all ages, including beginners, with a focus on safety and ease. Dual-sided grinding surfaces with fine-grain and coarse-grain. The fine-grain delivers a polished edge for clean, precise cuts, while the coarse-grain handles robust edge corrections. Both sides enable efficient touch-ups for a wide range of household and hobby tools. Kitchen helper for ceramic, carbon steel, and stainless steel blades. Simple handling that supports daily tasks such as vegetable preparation, meat portioning, and routine kitchen activity. Practical use scenarios - Everyday meal prep: quickly refresh chef’s, paring, and utility knives to achieve smooth, accurate slicing. - Ceramic blades: restore performance with controlled sharpening that protects the blade’s integrity. - Hobby and miscellaneous blades: maintain common kitchen knives, scissors, and small hobby blades used around the home.