Ningbo Yishan Hardware .,LTD offers DURATUFF flat thread rolling dies for machine screws and tapping screws with worldwide first clsaa quality and production output.The reason we have gained our strong reputation in fastener industry because of long life,high quality,and best service for more than 7 years in China.DURATUFF dies are being designed,manufactured and quality contorlled under most sophisticates systems.Besides,we have a group of dedicated and experiences engineers focused to finding thee right dolution to meet your production requirements.
