Origin	China
Model Number	HQ

we also produce 2. Diamond core bits for exploration mining and dam drilling grouting; (They are the AQ, BQ, NQ, HQ, PQ, BQ3, NQ2, NQ3, HQ3, PQ3, TNW, NMLC, HMLC, T2 46, T2 56, T2 76, T2 86, T2 101, T6 131, T6 146...)
3. Diamond reaming shells for exploration mining and dam drilling grouting; (They are the AQ, BQ, NQ, HQ, PQ, BQ3, NQ2, NQ3, HQ3, PQ3, TNW, NMLC, HMLC, T2 46,
T2 56, T2 76, T2 86, T2 101, T6 131, T6 146...)
4. Casing shoes bits; (AW, BW, NW, HW, PW)
5. DTH bits and the hammers; (Boart Longyear series; Atlas Copco series; Ingersoll-Rand Company series; Sandvik Company series);
6. Noncoring bits (natural diamonds, synthetic diamonds and natural+synthetic diamonds)
7. Natural diamonds core bits, synthetic diamonds core bits, PDC bits;
8. Drilling rods;
9. Core barrels;
10. Core lifter and core lifter case;