Tool: Electric Knife Sharpener
A type of knife sharpener that uses an electric motor with either a rotating or oscillating surface to grind, polish and sharpen the edges of knives. Often the surface is impregnated with diamond particles or similarly hard abrasive materials.
Most experts advise against frequent use of electric sharpeners since they tend to remove a lot of metal and will grind a blade down rapidly over a relatively short period of time. Instead sharpen with an electric sharpener infrequently and use a sharpening steel on a regular basis.