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Xlcmsy cobalt drill bit set, m35 hss metric straight shank twist drill heat resistant metal drill bits for hard metal, stainless steel, hardened steel, cast iron and wood, 1.5-6.5mm (13 pcs) 4.3 out of 5 stars 67. $12.99 $ 12. 99. get it as soon as tue, nov 17.

Hebei longway petroleum equipment co., ltd. is a company that specially manufactures kinds of petroleum drill pipes and joints.the production base locates in jinzhou, 50 kilometers from shijiazhuang---the capital city of hebei province.

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