This is a AccuSharp Knife Sharpener known as the 4-in-1, model 028C.
The AccuSharp(R) 4-in-1 Knife and Tool Sharpener combines every sharpening necessity into one pocket-sized unit. Featuring coarse tungsten carbide sharpening blades and fine ceramic rods" the unit also comes with a retractable diamond-tapered rod used for deep serrations. The rod also has a groove for all of your hooks and darts. Plus" the unit comes with a retractable flat diamond file for users who prefer a continuous surface for their sharpening needs. The model is finished off with molded rubber feet to keep the unit steady while in use.
Features:
Tungsten carbide sharpening blades
Retractable diamond-tapered rod
Also has a groove for sharpening hooks and darts