The Lion Sabatier 3 stage sharpener is a compact and efficient tool designed to sharpen and maintain the edge of various types of kitchen knives. It typically offers three different stages or slots, each with a specific purpose:

1. Coarse Stage: The first stage features a coarse diamond material which will repair a dull knife edge by removing metal from the blade. 
   
   
2. Medium Stage: The second stage uses a medium-grit material, made of tungsten, to further refine the knife's edge and prepare it for the final honing process.
   
   
3. Fine Stage: The third stage has a fine-grit ceramic material to finely hone and polish the knife's edge, giving it a razor-sharp finish. This stage can also be used on a more regular basis to maintain the sharp edge.

The Lion Sabatier 3 stage sharpener is designed for ease of use, and users simply draw the knife's edge through each slot to achieve the desired sharpness.