Encased in a smooth, hard plastic cover, the Bear Grylls Knife Sharpener fits easily in your pocket, always at the ready to fill your sharpening needs. The handle is made of a durable "grippy" rubber to give you a secure grip in wet or cold conditions. Coarse carbide and fine ceramic inserts will get your fine edge blade in shape. The two rod-shaped diamond-coated sharpeners allow you to sharpen even the serrated sections of your knife. Your Survival Series Field Sharpener will likely be the only one you'll ever need.