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About product and suppliers:
        Alibaba.com offers 1,252 square hole drill bit products. About 58% of these are drill bit, 1% are tool parts, and 1% are chisel. 

A wide variety of square hole drill bit options are available to you, such as high speed steel, high carbon steel, and plastic. You can also choose from core drill bit, countersink drill bit, and mortising chisel. As well as from masonry drilling, wood drilling, and woodworking. And whether square hole drill bit is free samples, or paid samples. 

There are 1,261 square hole drill bit suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Japan, and Taiwan, which supply 96%, 2%, and 1% of square hole drill bit respectively. 

Square hole drill bit products are most popular in South America, Domestic Market, and North America. 

You can ensure product safety by selecting from certified suppliers, including 222 with ISO9001, 145 with Other, and 27 with ISO14001 certification.