A pull-through sharpener has modules for both sharpening and maintaining knives. It is easy to use as the angle for the blade is set by the module, holding the knife in place.
Hold the sharpener firmly with your free hand.
Place the heel of the knife in the tungsten or sharpening module.
Draw the blade through from heel to tip – be careful not to use too much pressure or to push down on the knife; it should only require the weight of your hand to pull through.
Repeat the process a few times.
Next, place the heel of the knife in the ceramic or honing module.
Draw the blade through several times as above to finish then wipe the blade with a cloth.
Test the sharpness of the knife on a vegetable such as a tomato – the edge of the blade should grip immediately and not slip on the skin or dent the flesh. The blade should then glide through the flesh with the forward motion of the knife, not needing any pressure to cut through.