SUPERIOR QUALITY FASTENER CO., LTD. 
SUPERIOR QUALITY FASTENER CO., LTD. 
DAR YU ENTERPRISE CO., LTD. 
DAR YU ENTERPRISE CO., LTD. 
CHANNG CHIN INDUSTRY CORP.
CHANNG CHIN INDUSTRY CORP.
KWANTEX RESEARCH INC. 
KWANTEX RESEARCH INC. 
ALEX SCREW INDUSTRIAL CO., LTD. 
ALEX SCREW INDUSTRIAL CO., LTD.