What is Needles?

Needles are slender, usually pointed, instruments used for various purposes, most commonly for piercing or penetrating materials. Their applications are widespread, including sewing, knitting, embroidery (where they are used to pass thread or yarn through fabric), medical procedures (such as injections, biopsies, and acupuncture to administer medication or draw fluids), and even in industrial settings for tasks like applying adhesives or creating microstructures. The specific design and material of a needle vary greatly depending on its intended use.