... investigation and water well drilling. We have impregnated diamond type, surface set type, electroplated diamond type, T.C. type, PCD type ... , PQ,BQ3, NQ2, NQ3, HQ3, PQ3...T2 series: T2-46, T2-56, T2-66, T2-76, T2-86, T2-101T6 ... Profiles: "W" profile, "Flat" profile, "Semi-round" profile, "Cross" profile...Surface Set Diamond Core Bit:Bit Crown Profiles: "Semi-round" profile, "Step" profile...Welcome ...