A grinder is a useful kitchen appliance used to grind food ingredients into a fine paste or powder. It works with the help of an electric motor that rotates stones or blades to crush and grind items. A grinder is commonly used to prepare batter for dishes like idli and dosa, and also to grind spices, grains, and lentils. It saves time and reduces the effort compared to manual grinding. Grinders are usually made of strong materials like stainless steel and durable plastic.