Hilti started marketing a drill that also had a chiselling function, made by the Kocher Company, in Basel, under the name "Torna 765". After receiving customer feedback Hilti started a product development and improvement project under the name "Torna Entwicklung" (German for "Torna Development"), or "TE" for short, which has since then become the standard name for all Hilti electropneumatic tools. In 1967 the company introduced the TE17, a fully electropneumatic rotary hammer drill which featured a safety clutch, and it was shipped to customers in Hilti's first distinctive red toolbox. The global expansion continued throughout the 1960s and by 1971, Hilti's global turnover was 376 million Swiss francs across 45 countries, including new production facilities in Austria and in Germany. In 1974 Hilti started to develop and market anchor bolts, and in 1977 Hilti introduced its first chemical anchor product line. Two more production facilities were opened, a plastic manufacturing plant in Germany purchased in 1975 and a plant in England acquired in 1978. In 1979 the company opened another production facility in Tulsa, Oklahoma, USA, to produce anchors. During the 1980s Hilti formed market region centers for America, Europe, Africa and Asia, to improve the proximity to their customers. 1995–present In 1995 Hilti opened its first Chinese manufacturing plant in Zhanjiang; this plant was expanded to 55,000 square meters in 2005. Another manufacturing plant was opened in Shanghai in 2004. This plant employs 470 people. Basics Hilti is based in Schaan, Liechtenstein, and is the principality's largest employer. The company employs around 30,000 people worldwide. Hilti North America (HNA) Hilti has over 3,000 employees in the United States. HNA's headquarters had been located in Tulsa, Oklahoma, since 1979, although it has employees in all 50 states. It moved its North American headquarters from Tulsa to Plano, Texas, by June 2015 and opened a research and development center in Irving, Texas. HNA developed an employee corporate culture that was later adopted by the entire company worldwide. New employees complete a Basic Training Seminar in Tulsa for four weeks, and on a yearly basis employees complete a survey called GEOS (Global Employee Opinion Survey) in which they give feedback about the company. Hilti Northern Europe Hilti Northern Europe is headquartered in the Hilti Limited office in Manchester, Great Britain. The Hilti (Gt. Britain) office oversees a staff of over 1,000 in roles such as sales, engineering, marketing, finance, HR, IT,