... models 1,Types: pdc drill bit which are used for mining pilling, water well drilling or oil well drilling2,Model: various ... according to the requirements of customers3,Material: ally steel, tungsten carbide insert4,Color: can be as you like 5,Size: from ... formation .We have different and suitable types12,Button bit: small tooth, big tooth,conical inserts,chisel inserts13,Packing: in wooden case or ...