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About product and suppliers:
        Alibaba.com offers 1,734 heavy duty bits products. About 8% of these are drill bit, 3% are mining machinery parts, and 1% are screwdriver. 

A wide variety of heavy duty bits options are available to you, such as screwdriver set, core drill bit, and twist drill bit. You can also choose from high speed steel, tungsten carbide, and diamond. As well as from metal drilling, masonry drilling, and wood drilling. And whether heavy duty bits is free samples, or paid samples. 

There are 1,734 heavy duty bits suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of heavy duty bits respectively. 

Heavy duty bits products are most popular in Southeast Asia, South Asia, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 492 with ISO9001, 456 with Other, and 26 with ISO14001 certification.