The product name：Steel body coring bit 

Steel body coring bit Features：

Suitable for soft ~ medium hard formation drilling. High efficiency,strong impact resistance, can be widely used in rock coring in geological exploration, coal mining, mining, water conservancy and hydropower industry.

Steel body coring bit Models：Φ59mm、Φ65mm、Φ75mm、Φ94mm、Φ113mm、Φ133mm、Φ152mm、Φ175mm

We can produce bit and thread type according to requirements.