Wusthof Gourmet 12-Piece Knife Block Set Type: Cutlery Sets Features: Wusthof knives are dishwasher-safe but hand-washing is recommended. In the dishwasher,Wipe the knives clean with a wet cloth and dishwashing detergent. Dry immediately.,No metal is completely stain-free. To prevent slight tarnishing, be sure to remove acidic foods Material: Synthetic