Instead of buying new knives lost their edge, use the Swifty Sharp Cordless Motorized Knife Sharpener to return them to their former glory. With a built in guide the blade is held at the perfect angle to sharpen the knife to professional standards. Includes a catch try to collect metal shavings, and it's cordless design means you don't have to worry about random discharges or power fluctuations. Works on scissors and other sharp metal objects too.