H-Gang Security is the largest digital door lock manufacturer in Korea. Our products are perceived as high quality and trustw ... orthy business partner. We are also ODM partner with Samsung SDS. After having manufactured mechanical rim locks since 1980, we integrate our rich experience of mechanic locks and digital security technologies, and reach customers with innovative products. Through innovative products, strict quality management, and high-quality customer service, we promise to provide the world's best digital door locks that you use safely and conveniently. read more