This is Jack from Xi�an ATO Int�l Trading company , Our company located in Xi�an , China , we are professional bit exporter for many year , such as Tri-cone rock bit, Single-cone rock bit, PDC bit, we can offer the different types new bit for oil well, mine , well with the low price . Also we can supply the different types bit according customer�s requirement . Any question please feel free to let us know. Thanks &Best Regards Jack Yang</p>