1. [VERSATILE DUAL-SIDED SHARPENING] Features a dual-sided rhombus face, with a 400 grit for quickly restoring a damaged or dull edge and a 600 grit for fine honing and finishing. Suitable for a wide set of knives and tools, including kitchen cutlery, pocket knives, and gardening tools. 2. [EFFICIENT RHOMBUS MATERIAL] This sharpener utilizes high-quality rhombus, known for its extreme hardness and abrasive efficiency. It provides a faster and more effective sharpening process compared to traditional stones, ensuring your blades regain their razor-sharp edge with minimal effort. 3. [PORTABLE FOLDING DESIGN] The unique fan-shaped folding structure allows the sharpener to compact into a small size, protecting the rhombus faces when not in use. It is lightweight and easily fits into a pocket, backpack, or tackle box, making it perfect for outdoor activities, camping, and on-the-go sharpening needs. 4. [ERGONOMIC COMFORT GRIP] Designed with an ergonomic handle that folds around the sharpening stone. The handle features a non-slip, molded pattern for a secure and comfortable grip, ensuring stable control and safe handling during the sharpening process. 5. [COMPACT DIMENSIONS AND SPECIFICATIONS] This rhombus sharpening tool measures 22.6 * 10.1 * 2.2 cm (8.9 * 4.0 * 0.9 inches) when unfolded. It is constructed with a sturdy rhombus material and comes in a professional black color, offering both functionality and a sleek appearance. --- Package list 1 * Sharpener