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About product and suppliers:
        Alibaba.com offers 1,121 types of screw jack products. About 19% of these are car jacks, 10% are scaffoldings, and 7% are ladder & scaffolding parts. 

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

There are 1,121 types of screw jack suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Japan, which supply 96%, 1%, and 1% of types of screw jack respectively. 

Types of screw jack products are most popular in Mid East, Domestic Market, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 449 with ISO9001, 182 with Other, and 36 with ISO14001 certification.