This knife sharpener pairs perfectly with our Universal Series Knives. The Universal Knife Sharpener and a set of our Universal Series Knives would be a great gift for just about anyone, including college students, young couples or aspiring chefs!The sharpening mechanisms are designed to remove a minimum amount of steel while still increasing the sharpness dramatically.- The first slot is for straight knives, indicated by the straight walls around the sharpening mechanism.- The second slot is designed to sharpen the special serrations of the U-Series serrated knives, indicated by the serration design on one wall around the sharpening mechanism.Compact, ergonomic design collapses to fit neatly in a drawer.When open, the cover acts as a handrest while sharpening knives.When bottom, is in an upright position between the cover/hand rest and sharpening housing, it becomes a built-in guard to protect the hand while sharpening blade.Non-slip feet on the bottom of the cover/hand rest and sharpening housing keep the sharpener fully in place during use.Works for both right- and left-handed users.Note:For right-handed users, sharpen knives with right hand and hold handrest with left hand.For left-handed users, sharpen knives with left hand and hold handrest with right hand.