1.PDC drill bit 2.best price 3.wide size code 4.certified ... 5.delivery on time The characters of the T4185Q/M625PDC drill bit are as following:1. unit crown design, selection ... drilling. We are handling in tricone bits, PDC bits, core drill bits, drilling accessories and so on.Here is the range ... of tricone drill bit:sizebit typein.mm6152.4136,127,517,537,617,6376 ...