Xinxiang Donghai Industry Co., Ltd. is located in the Hi-Tech Zone Xinxiang City, Henan Province, China. We specialized in manufacturing the different series of Wire Thread Inserts according to National Standard, MS Standard,ZIN Standard, Unified Thread Standard and it also makes all kinds of related tools. We registered the self-owned brand Thaishell in 2014.Our research and development team consists of young and middle-aged experts having rich experience in fastener industry. We strict controls product quality and management system, to provide individualized product solutions.