1. Single Cut Augers and Double Cut Augers are suitable for
drilling in medium to strong rock (15~60MPa) 2. Sturdy and wearable
rock pilot for accurate positioning 3. Hard-facing strips for wear
protection and service life-extending 4. Kelly box size as per
customer demand ![](http://img.everychina.com/nimg/74/14/c32eec1d421e8649e1b1dd01b0b4.jpg)
![](http://img.everychina.com/nimg/f2/11/404dcf25df25e4e7961ed1509984.jpg)
Drilling bucket with rock drilling tooth by jthl made,Jietaihongli