... 5,cover all models 1,Types: pdc drill bit which are used for mining pilling, water well drilling or oil well drilling2,Model: various kinds and according ... mm)6,Moq:1 piece7,Bit body Color: can be as you like: matrix body,pdc cutters8,Certification: API9,Applicable f ... Moq:1 piece or: petroleum&gas,water well and mining10,Bearing sealed ...