1-API or ISO 9001 2- IADC(115-437) 3- High quality & competitive price 4- All model & dimension available 5-High speed Steel tooth Tricone drill bit Hejian Fist Petroleum Equipment Co., Ltd. We have been in line with the principle of "faith-based, quality of survival and mutual benefit, provides the highest quality products and attentive service for our customers". We are looking forward to ...