... NQ, HQ, PQ drill rod 2. Tapered drill rod, integral rod 3. Twist rod, extension rod, exploring water drill rod Specialisted in producing ... China, including of twist drill rod, extension rod, tri-angle rod, integral drill rod, water exploring rod, tapered drill rod, etc. ISO ... KWJ, HWJ Metric Series: 33, 42, 50 For more detailed specifications please feel free to contact with us. Anchor shank drill rod