8 1 2 center hole tricone bit

{"cid":"91219452","title":"Explosion Hole Petroleum Drilling Tricone Drilling Bit 6 1\/2 Inch","imgUrl":"https:\/\/img.chinax.com\/nimg\/f0\/f4\/58c3b1544e98c92377c451a61b32-200x200-1.jpg","attrs":{"Price":"According to product specifications","Delivery Time":"5-15work days","Certification":"ISO9001","Place of Origin":"HeBei . China","Payment Terms":"T\/T","Packaging Details":"According to customer needs","Name":"Roller cone bit","Advantages":"High efficiency","Applicable industries":"Construction Engineering, Energy and Mining","Material Science":"Carbon steel, high manganese steel, hard alloy","Processing type":"Forging","Type":"Bit","Usage":"Well drilling","Machine type":"Drilling tools, drilling tools, drilling equipment"}}