Beginning in the early 2000&＃39;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. Simplicity of design is the key principal behind the ShengDan product line. Basing on our eight-year-long experience, with the combination of our science and technology team, fine craft, high diathesis and strong technique ability, a well-equipped research and development base, improved control equipment,the resulting product is safe, simple, and infinitely useful.