Surface Set Diamond Bit, the same standar with Longyear company AQ, AQ-RSG, AWG(AX), AWM, AWT, LTK48 BQ, BQ-RSG, BQ-2.400, BQ3, BWG(BX), BWM, BWT, LTK60, TBW NQ, NQ--RSG, NQ-3.032, NQ2, NQ2-RSG, NQ3/NQTT, NQ3-RSG, NQ3-3.032, NMLC, NWG(NX), NWM, NWT, TNW HQ, HQ3, HWF, HWT, HWG, PQ, PQ3, PWF, SWF, UWF, ZWF, T2-76