Mainly used in watering and other construction and use the best material 45CrNiMoVA & YK05 Features:1) We sell different "down the hole" hammers and bits2) High pressure and low pressure types available3) Down the hole hammers:a) High pressure series: CWG, DH, DHD, COP, JG, JWb) Low pressure series: CIR, QC, J, JWD, JB4) Down the hole bits:a) High pressure: i) Diameter: 76-508mmii) Suitable for ...