We are a professional productions base of series of fast moving rock drilling tools, button bits drill parts, mining tools, DTH drill tools, DTH bits, ...
Thread button drill bits are made by high quality alloy steel bar and tungsten carbides. Through heat treatment, our drilling tools are tough enough ....
R25 thread fi 35mm button drill bits are made by high quality alloy steel bar and tungsten carbides. Through heat treatment, our drilling tools are .....