... bit which are used for mining pilling, water well drilling or oil well drilling2,Model: various kinds and according to the requirements ... body,pdc cutters8,Certification: API9,Applicable f Moq:1 piece or: petroleum&gas,water well and mining10,Bearing sealed: metal sealed ... , big tooth,conical inserts,chisel inserts13,Packing: in wooden case or steel case14,Payment term: L/C at sight,T/T15 ...