The Edge Pro Compact Electric Knife Sharpener is made from bonded synthetics. The synthetics used guarantee longer wheel life, uniform cutting, and minimum heat build up, so that de-tempering of your blade does not occur. The crossed ceramic rods create a fixed sharpening angle that lightly hones both sides of your blade at the same time; thus, putting a polished, razor-sharp cutting edge on your knife. Also, the crossed ceramic rods are excellent for giving already sharp knives a quick touch-up before use.