... NO.:BQ,Website:http://www.rejeedrilling.com, NQ, HQ, PQCustomized:Non-CustomizedCertification:BIN, JIS, AISI, APIType:Core ... :DrillingManufacturing Arts:SinterKind:Diamond DrillBrand:ForsunSize:Bq, Nq, Hq, PqExport Markets:Global Additional Info.Packing:CartonStandard:DCDMA, CDDA ... hardness and ground conditions.BQ NQ HQ PQ Diamond Impregnated Core BitBQ NQ HQ PQ Diamond Impregnated Core Bit