Chang Ling Metal Product Co., Ltd is an ISO9001:2008 certified company which is the leading manufacturer in wire thread inserts and tools business with more than 20 years experiences.We have advanced automatic production and test equipments with best research, sales, service and design system. Chang Ling Metal Product Co., Ltd has a long term cooperation relationship with many Chinese Aerospace ,Chemical, Military, Automobile companies such as CNHTC,CNAC,XCMG and etc. Our wire thread inserts have been widely used in Radar Shell, Motor, Instrument, Space Flight and Aviation, Ships, Arms and other fields. Chang Ling Metal Product Co.,Ltd could produce all kinds of helicoil according to clients requirements in Military Standards, Air Flight Standards and National Standards.Our CL-Helicoil could perfectly instead of German ,British, France and Japanese Helicoil. Welcome to ChangLing Helicoil!