Crown Ado Company Ltd. was found in 1998 with successful experience in manufacture of variety of screws, such as wood screws, deck screws, drywall screws, self tapping and drilling screws and so on. We brought in complete range of advanced equipments and techniques supported by a top R&D team.Having strict product quality assurance, management systems and advanced test instruments, the company achieved ISO9001 international quality certification.Through years of constant efforts, Crown Ado Company Ltd has become one of the leading manufacturers of construction screws in Mainland,China.