This product is easy to use. Simply position the dull blade on the sharpening slot and enjoy razor-sharpness in just seconds. It’s also safe to use and works for all types of blades, including high-quality, inch hard inch steel blades. Bring back dull blades to life. Why spend more money buying a new blade set? with this product, you can recycle your old, dull stockpile and sharpen them back to life.