Dongguan Shengang Precision Metal & Electronic Co., Ltd. was founded in February, 2000, affiliated to Shengang Precision Metal & Electronic (Hong Kong) Co., Ltd. We are a comprehensive international manufacturer integrating the research and production, development and sales, specialized in the line of door and window hardware. Our products contain ordinary hinges, functional multiple-direction adjustable concealed hinges, three-direction adjustable Japanese casement hinges, external ...   |