Use this Chopper for chop vegetables like carrots, celery and radishes for an instant salad. This Chopper is great for onions and even garlic so your fingers don't smell and it saves time. Put the onion/vegetable inside the chopping bottom- then press down the palm. Then press down the button with your palm of your hand-the more you hit the finer the food are minced. With every slap- the finer the food gets and turn into your desired shape.