Ideal for all of your sharpening needs, the Smith's Edge Pro Compact Electric Knife Sharpening System 50005 incorporates both manual and mechanical sharpening that provides a broad capability to easily sharpen dull blades and maintain razor sharp edges. The sharpening wheels on this Electric Sharpener from Smith's are made from bonded synthetics. The synthetics used are selected for their ability to guarantee longer wheel life, uniform cutting, and minimum heat build up, so that de-tempering of your blade does not occur. The wheels on the Smiths 50005 Electric Edge Pro Sharpener for Knife Blades are manufactured according to strict tolerances in order to ensure the same high quality on each and every wheel that they make. The crossed ceramic rods on the Smith's Edge Pro Electric Knife Sharpening Device put the final finished edge on your blade. 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 a quick touch-up before use. Just a few, quick pulls through the sharpening slot is all it takes with this Smith's Knife Sharpener. Smith's recommends always using the ceramic rods for final edge honing after you sharpen using the synthetic wheels. Again, just a few pulls through the sharpening slot is all it takes.