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About product and suppliers:
        Alibaba.com offers 3,639 worm screw jack products. About 57% of these are speed reducers, 28% are car jacks, and 3% are ladder & scaffolding parts. 

A wide variety of worm screw jack options are available to you, such as worm, bevel / miter. You can also choose from free samples. 

There are 3,642 worm screw jack suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 97%, 1%, and 1% of worm screw jack respectively. 

Worm screw jack products are most popular in North America, Southeast Asia, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 1,440 with ISO9001, 827 with ISO14001, and 90 with Other certification.