- Premium Quality: Crafted from high-quality diamond, this knife sharpener pen is built to last. Its fine grit ensures effortless sharpening, while the durable aluminum housing protects the sharpening rod and keeps your fingers safe. - Retractable & Detachable: This compact 3-in-1 sharpening rod is designed for portability. With a retractable length ranging from 14cm to 23cm (5.5-9.1 inches), it easily fits in your bag or tackle box, making it convenient for on-the-go sharpening. - Special Design: The pen-shaped device features a unique 3-in-1 design suitable for sharpening a variety of dull knives. It includes a dedicated groove for fishing hooks, and the conical grinding rod is specifically engineered for serrations and gut hooks. - Save Time: Maintain your kitchen knives with ease using this efficient diamond sharpening rod. It quickly restores the sharpness of your blades, allowing you to save time and energy. Ideal for both half-round and flat surfaces, it is compatible with standard knife edges. Use Scenarios: 1. Perfect for outdoor enthusiasts, this sharpener is ideal for keeping your fishing hooks sharp while on a fishing trip. 2. Use it in the kitchen to quickly sharpen chef knives, ensuring your meal preparation is efficient and enjoyable. 3. Great for hobbyists, this tool helps maintain the sharpness of knives used in crafts or DIY projects.