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The product descriptionThe goal of drilling tools is the completion of rock drilling and drilling hole through transmitting the energy produced by the rock drill to rock. QIANRUI DRILL TOOLS designed and produced the new series MF drill rods aim at open air drill specially with the strict science and technology achievements and the perfecting production technology after collecting a lot of customer feedback of open air drills. New series of drill rods improve the speed of rock drilling with good transmitting of energy from drills to rock,Website:http://www.qianruidrill.com, stronger drill rods