Our headquarter is located in Nanjing, with the factories on the outskirts of Nanjing, Jiangsu, China. Beginning in the early 2000's with two main products, TengDa drill bit and HuaRui security door, ShengDan has been continuing its dogged pursuit of the best in tools, hardware construction and decoration. Shengdan has also set foot in electrical equipments, construction material, chemical material, monitoring equipments, and fire fighting equipments.