Established in 1992, Nanjing NKK EXPO CO.,LTD is a specilized manufacture of exhibition products,such as the exhibition booth series,maxiam series,truss series and aluminum extrusion series. Our deep-processing factory is equippted with several advanced machines and testing instruments, to guarante the production capacity and quality. Our powerful seinor engineers team support Technology and Patent Strength. We have many inventions and utility model patentsinclude utility model of straight tension lock, High tension lock and 45 degree tension lock.In 2002, we applied patent for utility model of exhibition board connectorm,designed for a Hongkong Company. This system is very easy for setting up and dismantling. In 2006, we applied the invention patent for our new tension lock. In 2007 we made (US9-A) 9mm groove tension lock for a company of United States. At the end of 2008, we developed another kind of tension lock which can hold at least 2000kg's weight for another US company. Our registried trade mark KJ brand products got very good reputation from domestic and oversea. We give 3 year warranty for tension locks and all our products are ISO9001:2000 certified.