... pric Diamond Core Drill Bit Impregnated core drill bit(BQ,NQ,HQ,PQ) Impregnated core bits are widely ... -7/8EWT,AWT,BWT,NWT,HWTEX-EWT2-8655mm4x5-1/2AWF,BWF,NWF,HWF,PWFAX-AWT2-10166mm6x7-3 ... /4NWD-4,HWD-4BX-BWT2-11676mm3-1/2x2-1/8AWC-3,BWC-3,NWC-3,NX- ... NWT2-13186mm4-5/8x3AQ,BQ,NQ,HQ,PQPX-PWT2-146101mm5- ... TS-101 TS-116 TS-136 TS-146 BQ NQ HQ PQ Diamond Core Drill Bit(Made ...