Handheld portable knife sharpeners are extra handy for chores that you run into when out in the field. Putting a new edge on your knife occasionally can make a big difference in how quickly, and how well, you get certain jobs done. The same can be said for butchering chores. If a knife gets dull and the job becomes more laborious, someone can whip out a handheld sharpener, put on a new edge and get back to the task at hand. The best handheld sharpeners, despite their small size, have two different stages—the first is a coarse stage that replaces the dull edge, the second is a fine stage for honing and polishing.