Suzhou Energy Tool Co., Ltd . (short for ENG ) is a high-tech company formed by a group of drill bit experts with over 20 years of work experience in the world's top oil service companies. ENGhas cooperated with many research institutes at home and has formed an advanced technological system based on market-oriented and continuously promoting technological innovation and product improvement. ENGS bits production lines are equipped with 5-axis machining centers, Modern lathes, and FMS (Flexible manufacturing system ) and can produce matrix body and steel body PDC bits from 3-1/4 to 26 in diameter.