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About product and suppliers:
        Alibaba.com offers 1,441 heavy duty bits products. About 14% 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 drilling equipment, drilling tool. You can also choose from free samples, paid samples. 

There are 1,441 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, Western Europe, and North America. 

You can ensure product safety by selecting from certified suppliers, including 516 with ISO9001, 434 with Other, and 24 with ISO14001 certification.