120mm*450mm NCCTEC crown diamond drilling bits | 4.8” concrete wall wet core bits | Professional engineering core drill

120mm*450mm crown diamond drilling bits | 4.8” concrete wall wet core bits | Professional engineering core drill.

if you want 18mm- 76mm diameter drill bits , please see them here, they are global FREE SHIPPING ! :

if you want 83mm- 230mm diameter drill bits , please see them here:

if you want 245mm- 350mm diameter drill bits , please see them here:

Speed :0.82cm per minute.

Performance:

NCCTEC core bits select the high-quality diamond and alloy powder, professional reinforce the high standard fixture concrete, high-density reinforced concrete,brick design formula of high-density reinforced concrete, fast drilling speed, long life.

Rooftop tooth design.

good Concentricity.

guarantee small work swing and high precision drill.

Using the the German CNC laser welding equipment and technology to produce a world-class level products,head welding firm,not easy to drop tooth,fast drilling speed.

NCCTEC Integrated drill has affordable prices for concrete,drill the wall , has a good performance.

if the drill items containing fixture, it is recommended to use the separated structure drill,it has longer life and easier to replace the ncctec core drill head.