A needle is a slender, pointed tool used for sewing or stitching fabric together. It typically has a small hole, called an eye, near one end to hold the thread. Needles come in various sizes and types, designed for different materials and purposes, such as hand sewing, machine sewing, or embroidery. In addition to sewing, needles are also used in medical settings for procedures like injections or drawing blood. These medical needles are often made of stainless steel and come in various gauges, which determine their thickness. They play a crucial role in healthcare, allowing for precise delivery of medications or vaccines.