No electricity is needed, zero chance of touching blades while operating. All parts are made of food-grade material, with no BPA. Rotating 1 circle equals cutting 12 times. This rotary cheese grater helps get food preparation faster with less effort, just turn and rotate to finish the job! All parts are detachable for easier assembly. It only takes 15 to finish the cleaning under the running water, top dishwasher is safe as well. The cheese grater contains 3 blades that can meet your different needs for slicing/shredding/fine shredding. Suitable for cheese, zucchini, cucumber, carrot, nuts, salad, toppings, and more. Honestly a great gift for family, and friends! We believe the rotary grater will give you the best user experience.