1.Rock tools for furnace 2.Long working life 3.ISO9001 certificate ... . Export to many countries We are a professional manufacture of rock drilling tools, mining tools, DTH Drilling tools. construction tools and ... , U84, U85, U92, U94, U95, U118 And coal bolting bit and coal bolting rod.6. All kinds of casing bits for shield ... , Cross type bits, button bits and X type bits etc) rock tools for furnace