We are shandong rock dirlling tools co.,ltd. We are a professional production base of series of rock drilling tools with scientific research,design exploiture and trading together.we can supply rock drilling tools and mining tools,which include five series,more than five hundred types.They are Tapered drilling tools,Threaded Extension drilling tools,Down the hole tools,Tricone bits and Coal mining tools.(e.g:Chisel Type Bits,Cross Type Bits,Button Bits,Tapered Drill Rod,Shark Adapter Rod Standard,Drifting Rod,Coupling Sleeve,Shank Adapter,Extesion Drill Standard,MF-Rod,Bits and Adapter Coupling,Latent-hole Bits,Latent-hole Rod,Coal Cuter Drilling Tools,Pneumatic Drill Rods,Integral Drill Rods etc.) we can also produce other products according to the customers' requirements .If you are interested in any kind of product.Please send me the E-mail. (E-mail:hqgss1123@yahoo.com.cn)