The SOG Countertop Knife Sharpener is the newest generation sharpener that makes it easy to get a razor sharp edge on your knives. Just attach the sharpener to any flat non porous surface, activate the suction and pull your knife through it. Makes it easy to get an edge on your knife. The sharpener is small enough that it transports and stores easilty. Also has a one year warranty against defects in material and workmanship.