Vulkanus Professional Knife Sharpener Sharpening and honing with one device only Universal Sharpener that automatically adjusts to knife's specific cutting angle Gives smooth as well as serrated blades a razor-sharp makeover (microcorrugation) Easy to use! Operator needs only to draw the knife back through the sharpener High quality and extreme robustness: the stainless steel version of this knife sharpener easily lives up to the expectations and demands of Professional kitchens.