... A simple crown geometry that makes them less susceptible to in-hole damage than bits produced with other ... -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- ... ,NQ-3,HQ-3,PQ-3UX-UWT6-86131mm10x7-1/2SWFZX-ZWT6-101146mm UWF T6-116 ZWF T6 ... 116 TS-136 TS-146 TNW Diamond Core Drill Bit (Dual Biconical)