A hypodermic needle is a slender, hollow medical tool used for injecting substances into the body or extracting fluids from it. Commonly attached to a syringe, it penetrates the skin with minimal discomfort, ensuring efficient drug delivery or fluid sampling. Made from stainless steel, hypodermic needles come in various gauges and lengths depending on medical needs. They are essential in hospitals, clinics, and laboratories for vaccinations, blood draws, and intravenous therapies. Designed for single use, they help prevent cross-contamination and ensure patient safety. Their precision and reliability make them a critical component in modern medical care.