The Slap Chop is a manual chopper machine that works when you slap theplunger part. Every slap triggers the 3 blades below to chop and cutthe food. The more you slap the Slap Chop, the finer the food gets.The Graty for cheese comes with 2 blades, fine andcoarse. Place any kind of cheese in the container, turn and press theblack top twister and the cheese comes right out for omelets,. please view the video for more details.