Description: Features:Grinding tool: loose pen cap, diamond round rod end to the right place, tighten the nutWpr. One hand clamped sharpener, the other hand tool in the flat part of the diamond rod back and forth grinding, grinding for knife can be sharp. Grinding Fish Hook: Loose pen cap, diamond rod rounds the end of the corresponding spot, tightens the cap. One hand clamped the sharpener, the other hand holding the hook in the "V" type socket on the back, Grinding to the hook can be sharpGrinding serrated knife: loose cap, diamond rod tip to fine-tune the end of the corresponding place, tighten the cap. One hand with the knife, blade up; The second squeezer part of sharpening blades with a toothGrinding back and forth, grinding on a sharp knife can be. Wipe the tool with a damp cloth or rinse with water after sanding, then dry. Clean sharpening with soft brush diamond rod parts. Specifications:Material: AluminaSize: As the picture showColor: As the picture shownQuantity: 1pcNote: 1. Transition: 1cm=10mm=0.39inch2. Please allow 0-1cm error due to manual measurement. Pls make sure you don't mind before you bid.3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included:1pc*Diamond Knife Sharpening Stone Fishing Knives Tools for Camping