Yanggu Yihui Drilling Tools Co.,Ltd.
ADDRESS:No.216 Zhengyang Road, Qingdao, Shandong,China.
EXX: TC cross bit for soft to medium rock formations.
Drill bits are used for strong fractured rock formations.It belongs to Self-drilling anchor tools parts
We are professional manufacturer and produce these items by our selves, we have totally advantage in the whole market.