Multipurpose Sharpening Stone Pen Type Diamond Knife Sharpener Stick for Outdoor Kitchen Features: Used for general sharpening jobs, hunting, outdoor exploration, fishing etc. Ideal for hunter-fishermen, campers, workers and bowmen. Handy for most cutlery, tool sharpening need, ideal for kitchen, also ideal for mending knives, serrated blades and scissors. Pocket knife sharpener with fine grit, can be scalable in reverse, then you can adjust to variable lengths. Design like a pen, and with a shirt pocket clip for storage, more convenient. Specifically designed for outdoor enthusiasts---- it is a must-have tool for them. Specification: Condition: Material: Diamond Color: Blue Pen Case Size: Approx. 12.5 x 1 cm / 4.9 x 0.4 in  Max Length: Approx. 23 cm / 9.1 in (Installed)  Weight: Approx. 50 g  How e:  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 soft brush. 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. Note:  * Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. (The measurement allowed error is +/- 1-3cm.) * Only the diamond sharpener, knife and other items appear in the picture are not included in the listing.