... ISO Certificated 4:Long service life DTH drill rods1,Top-hammer drilling tools including thread button bits(R25,R28 ... MF rods, extension rods, shank adapter, etc2,DTH drilling tools including Air DTH hammer,DTH bits with COP, ... thread.Claw tybe bits, Clay bits,etc4,Diamond core drilling tools including the diamond core bit(BQ,NQ,HQ ... plate,coupling.), Rebar rock bolting, Friction bolting. etc. Drill pipe