Staedtler Mars GmbH & Co. KG (German pronunciation: [ˈʃtɛtlɐ]) is a German manufacturing company based in Nuremberg. The firm was founded by J.S. Staedtler in 1835 and produces a large variety of stationery products, such as writing implements (including technical drawing instruments),[1] art materials, and office supplies. Staedtler claims to be the largest European manufacturer of wood-cased pencils, OHP pens, mechanical pencils, leads, erasers, and modelling clays.[2] Staedtler has over 20 global subsidiaries and seven manufacturing facilities.[3] Over 85% of the production takes place in the headquarters in Nuremberg, though some of its products are made in Japan. Its "Noris" line of pencils are extremely common in British schools.[4]