This incredible 3-slot system revolutionizing the art of knife sharpening! The 1st diamond sharpening rod repairs and straightens damaged blades. The 2nd slot sharpens to restore its V-shape. Finally, the 3rd slot fine tunes for a clean polish. Whether you're right or left-handed,just pull along ONE DIRECTION ONLY. The ergonomic handle allows you to restore your cooking knives in no time. Designed with a non-slip base, our kitchen knife sharpener offers comfortable control while you work. 7.87" L x 1.69" W x 2.75" H