These are 3pc. essential to have, an ideal gift set for any occasion and a traveling set for a cook who loves to travel with their knife set. Handwashing is recommended because of the dishwasher's abrasiveness may harm your knives and dull the blade. The dishwasher will scratch, chip, dull, stain, and otherwise damage your knives. This will lead to a once-beautiful knife looking worn and aged. One cycle can chip the blade or snap it in two. Then there’s the detergents, which can be just as dangerous as the machine itself, causing knives to dull or discolor. Also it is personal safety including your fingers when you’re unloading and loading, it is easy to reach for young children who may be in danger reaching their favorite spoon in the dishwasher. These have a lifetime limited warranty for any manufacturer's defects.