TECH  DATA  OF  YHA 7 1/2 DESIGN    CAPABILITY  FAQ: 1.Q:What kind of packing do you have?    A: Wooden case free of fumigation;cartons;packing can be customized. 2.Q:What is your price AND services advantages?    A:Yinhai brand are 100% factory directly sales,API production process guarantee,Provide customized services for brand processing. for the aim to reduce the cost of drilling for you and give enough profit room for trading companies, worry free after-sales service.Welcome you to make  a video-call to inspect our factory. Hejian YINHAI ROCK BITS are manufacturer of tricone bits, PDC bits, single roller cone bits, Piling foundation single cones/ rock reamers. Our bits based on high-tech skills and designs are used in explitation of natural gas, crude oil, water well, geological exploration, HDD drilling and piling foundation. There are technical research team, production management team and professional sales team in our company to serve our customers. . Such as Tricone bit, PDC bit, cones, Roller bit, Diamond Core bit, Bi-center bit, hammer bits, drag bits, Hole opener,PDC reamer,  HDD vertical reamer, rock reamer and other accessories such as subs, nozzles,adapters, bit breakers so on.