We are Liaocheng Tiangong Tool Co., Ltd in China, we mainly produce and export rock drilling tool, mining tools, foundation drilling, road construction tools, in particular the tunnel & shield driving machine tools. Face Single Disc Cutters, Face Twin Disc Cutters, Center Disc Cutters, Disc Cutter Rings, Shafts, Scrapers, etc. Size:137mm---432mm (5.4inch---17inch) They are apply to the sand limestone, dolomite, kimestone, condensate, such as granite from soft rock to hard rock, all rocks. And they are suitable for Herrenknecht, Mitsubishi, Wirth, Komatsu, Robbins tunnel boring machines, we also can produce according to customers drawings or samples.