We supply kinds of rock drilling tools, which export our products to USA for more than 10 years. We hope to build a long term business relationship with you in the near future. Please feel free to contact us if you are interested in our products. The following is the products list : chisel type bits cross type bits button bits tapered drill rod shark adapter rod standard Threaded Bits (Cross & Button Type), Coupling Sleeves, Shanks rifting rod coupling sleeve shank adapter extesion drill standard MF-rod bits and adapter coupling latent-hole bits latent-hole rod coal cutter drilling tools pneumatic drill rods integal drill rods Self-Drilling Rock Bolting Tools: Rock Bolting Rod, Steel Cross Bits, TCI Bits (Cross & Button Type), Coupling Sleeves, Nuts Rock Drilling Tools for Quarrying, Mining, Tunneling Industries: Tapered Drilling Rods, Tapered Bits (Chisel, Cross & Button Type) Rock Drilling Tools for Quarrying, Mining, Tunneling Indust Rock Drilling Tools for Geological Prospecting: Diamond Core Drill Bits (Double / Single Tube) Tread coupling sleeves Coal bits Mid-hollow rock drill steel bar Expanding hole drill equipment Rock drill rods Shank adaptor Tread extension drill rods Petal type bits Diving bits Button bits Straight tread thickening reinforcing bar joins, coupling sleeves Fix anchor tool Phombus section coal rotary rods Pneumatic picks, shovels, hammers If you are interested in the products above, please feel free to contact us. otherewise, we still produce all kinds of drill bits according to your demand or drawing or picture.