Smith's SM51111 Mesa onyx black adjustable electric knife sharpener offers, in a single slot design and diamond synthetic abrasive sharpening wheels and blade guides which hold the knife at the correct sharpening angle. This Mesa electric knife sharpener provides correct sharpening angle, that it maintains and extends the life of fine knives. Smith's SM51111 electric knife sharpener has diamond interlocking wheels remove a minimal amount of metal and sharpens both sides of the knife at the same time without damaging the knife.