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About product and suppliers:
            868 square hole drill bit products are offered for sale by suppliers on Alibaba.com, of which drill bit accounts for 31%, mining machinery parts accounts for 3%, and milling cutter accounts for 1%. 

A wide variety of square hole drill bit options are available to you, such as center drill bit, core drill bit, and twist drill bit. You can also choose from wood drilling, metal drilling, and masonry drilling square hole drill bit, as well as from carbide, tungsten carbide, and carbon steel square hole drill bit

There are 392 suppliers who sells square hole drill bit on Alibaba.com, mainly located in Asia. The top countries of supplier is China, from which the percentage of square hole drill bit supply is 100% respectively.