A drawing pin (in British English) or thumb tack (in North American English), also called a push-pin, is a short, small pin or nail with a flat, broad head that can be pressed into place with pressure from the thumb, often used for hanging light articles on a wall or noticeboard.
Thumb tacks made of brass, tin or iron may be referred to as brass tacks, brass pins, tin tacks or iron tacks, respectively. These terms are particularly used in the expression to come (or get) down to brass (or otherwise) tacks, meaning to consider basic facts of a situation.
London Dingle patented the "push-pin" in the US in 1900 and founded the Dingle Push-Pin Company. Dingle described them as a pin with a handle. In 1903, in the Germany town of Lychen, clockmaker Johann Kirsten invented flat-headed pins for use with drawings, although other sources credit Austrian factory owner Heinrich Sachs with inventing a pin pressed from a single disk of metal in 1888. This style of pin, with the pin formed by a cutout from the head, is still widely sold in Austria under the brand 'Sax'.Katrin Bischoff, Jürgen Schwenkenbecher. Die Reißzwecke von Lychen In: Berliner Zeitung, 11. November 2003; Retrieved on 4 October 2013.
Domed or gripped heads are sometimes preferred over flat heads as dropped flat-headed pins may easily point upward, posing a hazard. Drawing pins also pose a hazard of ingestion and choking, where they may do serious harm.
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