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Ningbo Yishan Hardware Co., LTD is the industry-leading flat thread roll dies factory in China. Ningbo Yishan
is ISO certified factory. We have technical experience and capability to develop hundreds special thread profile
roll dies. Ningbo Yishan roll dies are made in our own factory from A to Z at Ningbo China, material cutting, milling,
grinding, heat treatments, precision grinding, thread grinding and surface treatments.
Ningbo Yishan is earned customers trust by earnest service. Ningbo Yishan recognized by our valued customers past 16 years. Ningbo Yishan is after heat treatment screw roll dies expert factory. Contact DURATUFF and apply today, you can get free thread rolling dies sample to test! |