Aladdin's Manual Pull Through Knife Sharpener gives dull knives a razor sharp edge, quickly and easily. No more guessing blade angles, and it's easier than using a knife sharpening steel or sharpening stone. Set it securely on a work surface and pull the knife blade through the slit which houses the tungsten carbide sharpening tips. Slide the blade through, reposition, and slide again, repeating this step 4 to 6 times to sharpen. Dull knives become sharp-as-new in just seconds.Works for regular, hollow ground, and stainless steel blades without any guess work. Its compact size easily stores away in a kitchen drawer. Made in the USA from sturdy plastic with tungsten carbide sharpener tips, it wipes clean with a damp cloth. Wipe knife blades clean after each sharpening to remove any fine metal shards.