Hole opener bit,reamer bit,rock bit,cone bit
1. Bigger diameter for piling in construction field, bridge construction, super

highway construction, railway construction etc.

2. This series of bits are suitable for different complexe

formation, shales, limestone, cobblestone, dolomite, chert etc.

3. The advantage of this series of bits is that it can be manufactured in very big

diameter as customer' s special driling.