... 1.Drill rod:BQ NQ HQ PQ 2.Core barrel: BQ NQ HQ PQ head assembly and core barrel parts ... 3.AQ BQ NQ HQ PQ T2 T6 etc. Diamond core bit, reaming shell & ... inner tube wrench foot clamp etc5. P- Gauge Core Bits: PQ, PQ3, PWF-Long, PWF-Short6. S- Gauge Core Bits: ... . Chinese Standard Metric Core Bits for Single Tube Core Barrels: φ36, φ46, φ56, φ59, φ75, φ91, φ110, φ130, φ160, φ ...