... 9001;High quality OEM is ok. Hard alloy deep hole drill in deep holeTungsten tip with alloy stell shankDifferent specifications.OEM ... is ok. High quality;Passed ISO:9001Mainly used for deep hole drilling, well drilling, metal drilling, masonry drilling, wood ... , mining machinery and hydraulic parts etc. Applicable to the deep hole processing machinery, machining center, turning center etc satisfy ...