1.PDC drill bit 2.best price 3.wide size code 4.certified by API,ISO 5.delivery on time ... The characters of the Y3107/M715 PDC drill ... diamond bit, also with many technical staff familiar with drilling. We are handling in tricone bits, PDC bits, core drill ... 63713 5/8346117,126,127,517,537,617,63714 3/4374.6124,517,537,617,63715381124,517,537, ...