Rock Drilling bits for mining, quarrying ,tunneling

Zhejiang Kaiyu Drilling Bits Co.,Ltd is established in year 1971. It was government-owned company before year 1996. It focus on the production of rock drilling tools, DTH hammer, drill bits, drill rod, drill pipe. It has three levels of goods, which suits for different markets, european, North America,middle east, south-east Asia and so on. Pls contact me at [email protected], or [email protected] My contact number is :0086 13736665960