mining tools chuck adapter 1,ISO9001 certificate 2,Materials:Steel body, made by material 42CrMo We are specialized in producing cold forging and hot forging products. The products are mainly applicable to metal mine such as iron mine, coal mine and gold mine, laneway, tunnel, quarry, plaster mine, transportation, water conservancy and civil demolition, etc. The main material is 35CrMo and 42CrMo ...