Tbest Multipurpose Sharpening Stone Retractable Pen Type Diamond Pocket Knife Sharpener

How to Use:  1. Screw the cap loose, let the diamond rod round head out to the appropriate location, tighten the cap.  2. One hand clenched sharpener, another hand put the knife on the diamond part, back and forth grinding. 3. After the tool is sharpened, wipe it with a damp cloth or rinse with water, then dry. Clean the sharpener with a  Material: Diamond Pen Case Size: Approx. 12.5 * 1.6 cm / 4.9 * 0.6 in  Max Length: Approx. 23 cm / 9.1 in (Installed)  Weight: Approx. 50 g  Package List: 1 * Blue Pen Case 1 * Diamond Sharpening Stick Precautions: * Avoid excessive force when grinding the knife to prevent the hand from touching the cutter. * After use, the tip of the sharpening tool should be storaged in the penholder. * Knife sharpeners and knives should not be placed where children are easy to reach to avoid accidents.