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Reference.org
Hook-and-loop fastener
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<p>Hook-and-loop fasteners, commonly known as Velcro (a <a href="/facts/Generic_trademark/c9VgT8RG">genericized trademark</a>), hook-and-pile fasteners or touch fasteners are versatile fastening devices that allow two surfaces to be repeatedly attached and detached with ease. Invented in the mid-20th century, they are widely used in clothing, accessories, and various industrial and consumer applications. The fastener consists of two complementary components: one with tiny hooks and the other with soft loops. When pressed together, the hooks catch the loops, creating a secure but temporary bond. The fasteners can be separated by peeling or pulling the surfaces apart, often producing a distinctive ripping sound. </p>