... length: 0.5 m, 0.8 m, 1 m to 6 m. 2, Factory Supply directly. 3, Widely usage: quarry, ore, tunnel. Detailed Product ... m, 0.8 m, 1 m to 6 m.integral drill rod, drill bits 1. competitive price 2. high quality 3. factory supply directlyThe drill ... pipe specification:1, Drill Bore Diameter ...