D65mm Roof Type Diamond Core Drill Bits For Granite Drilling

These 65mm outer diameter granite diamond core drill bits are specifically designed for drilling through granite and other hard stones. 

Roof core bit segments are easier to drill into the stones. We use the highest quality steel barrel to weld our mature formula segments in order to deliver a fast drilling speed and superior lifespan.

These granite diamond core drill bits are designed to provide superior performance and speedy, aggressive drilling. They are made with industrial grade diamond powder and cobalt powder to ensure stable drilling performance and superior lifespan.