The Professional Knife Sharpener by Sharper Image provides three essential functions for your metal kitchen knives: honing, sharpening and polishing. It works in seconds on virtually every metal knife in your drawer, including Japanese knives, chef’s knives, serrated knives, boning knives, paring knives and cleavers. Made with durable Stainless Steel. The Professional Knife Sharpener by Sharper Image provides three essential functions for your metal kitchen knives: honing, sharpening and polishing. It works in seconds on virtually every metal knife in your drawer, including Japanese knives, chef’s knives, serrated knives, boning knives, paring knives and cleavers. Made with durable Stainless Steel.