Integral Drill Steels rock breaker tool rock cutting tools Integral Drill Steelsrock breaker toolrock cutting toolsHandHeld Rock Tools: Integral Drill Steels, Tapered Drill Steels, Tapered Drill Bits (Chisel/Cross/Button Bits), and various types of RockDrills. specificationD:29~42mmA=B: Hex.22, Hex.25L: 800~6000mm Specifications Steel grade: 95CrMo equivalent ~ SANDBAR 20 or C253, 55SiMnMo Size: ...