1.  different dia model for your choice

 2.  made from diamond thin wall

Feature:

1. Thinner diamond segment and thinner tube wall can

      easily reduce the resistance and increase the drilling speed.

2. Very fast cutting speed and low cutting pressure.

3. Different connection end for different drilling machine.

4. Especiall effective in drilling through reinfored concrete

5. The diameter of them can be produce according to the  requirment of users,