... HQ,BQ diamond drill bit /diamond core bitSize Available: "Q" series: AQ, BQ, NQ, HQ, PQ/AQTK, BQTK, BQ3 ... , NQ2, NQ3, NQTT, HQ3, HQTT, PQ3, PQTT T2 series: T2 46, T2 56, T2 66, T2 76, T2 ... B76, B86, B101, B116, B131, B146 WF series: HWF, PWF, SWF, UWF, ZWF WT series: RWT, EWT, AWT, BWT, NWT, HWT ... WM series: EWM, AWM, BWM, NWM, HWM WG series: EWG, AWG, ...