... tools Integral Drill Steelsrock breaker toolrock cutting toolsHandHeld Rock Tools: Integral Drill Steels, Tapered Drill Steels, Tapered Drill Bits ( ... ) Raw materials: 55 SiMnMo, 95CrMo.2) Shank sizes: H22 x 108mm; H25 x 108mm .3) Length: 0.4m-8m.4) Bit diameter ... , 37, 38, 39, 40.5) Type: Cross Type; Chisel Type. rock drilling tools