... 3.wearability 4.High efficiency 5.Long service life A,DP Anchor drill bits is introduced,Product name specificationsModelCoupling DimensionnoteDP Anchor ... drill bits32*M12DPM12DP Anchor drill bits32*T16DPT16 B,DP Anchor drill bitsillustration,C,DP Anchor drill bits product features and use,1 ...