Reliable Material and durability: The fish hook sharpener is made of 45 steel plated with adamantine, and is heat treated with a temperature quenching process. It offers hardness and wear resistance, is corrosion resistant in humid environments, and helps prolong the tool's service life. Comfortable and secure grip: The fish hook file features a nonslip rubber handle for a comfortable, secure grip. It remains stable in wet or lowtemperature conditions, reduces hand fatigue, and its ergonomic curved design fits the hand to minimize slipping during long use. Diversified color options: Available in four colours red, blackgreen, black and blackblue. Whether you want to match your fishing gear or simply choose a preferred color, you can find a satisfactory option that suits your style. Compact and portable design: Short and compact diamond hook sharpener with a strength nylon lanyard. The lanyard can be hung on a tackle bag or backpack buckle for easy access; when not in use it can be stowed in a clothing pocket, taking up virtually no space. Use scenarios: Useful on boats or by the riverbank for quick sharpening between casts; ideal in humid or wet environments where corrosion resistance helps maintain readiness; convenient for travel or outdoor trips, fitting in a pocket or tackle bag for onthego maintenance.