Feature: *Pocket ener pen 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 *Handy for most cutlery, tool ening need, for kitchen, also for mending, serrated blades and scissors *Used for general ening jobs, hunting, outdoor exploration, fishing . * for hunter-fishermen, campers, workers and bowmen *Material: Diamond+Stainless steel *Color: Blue *Pen Case Size: Approx. 12.5/4.9 in *Max Length: Approx. 23 cm/ 9.1 in(Installed) How to Use: 1. Screw the cap loose, let the diamond rod round head out to the appropriate location, tighten the cap. 2. hand clenched ener, another hand put the blade on the diamond part, back and forth grinding. 3. After the tool is ened, wipe it with a damp cloth or rinse with water, then dry. Clean the ener with a soft brush. Package Contents: 1*Blue Pen Case 1*Diamond ening Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.