Hejian Yinhai Rock Bits Manufacture Co, Ltd. yomwe idakhazikitsidwa ku 2008 ili ku Heiian City, Hebei Provice, China.Ndife opanga ma tricone bits, ma PDC bits, Piling maziko a single cones / rock reamers.Tinthu tating'onoting'ono totengera luso laukadaulo wapamwamba komanso kapangidwe kake timagwiritsidwa ntchito pofotokozera gasi, mafuta osapsa, chitsime chamadzi, kufufuza zachilengedwe, kubowola kwa HDD ndi kuyika maziko.Pali gulu lofufuza zaukadaulo, gulu loyang'anira zopanga komanso gulu la akatswiri ogulitsa pakampani yathu kuti titumikire makasitomala athu..Monga Tricone bit, PDC bit, cones, Roller bit, Diamond Core bit, Bi-center bit, nyundo, kukoka, Hole opener,PDC reamer, HDD vertical reamer, rock reamer ndi zina monga subs, nozzles, adapter. , bit breakers, etc.