20mm Diamond Core Drill Bits for Granite Drilling

Buy cheap granite diamond core drill bit from China supplier

This 20mm granite diamond core drill bits are designed for drilling granite and hard stones. We use the grade A quality steel barrel to weld our mature formula segments on it. So it can deliver a fast drilling speed and superior lifespan. Welcome buy granite diamond core bits from Sunny!

These diamond core drill bits are engineered for exceptional footage and fast/aggressive drilling characteristics. We adopt the industrial grade diamond powder and Cobalt powder to produce our diamond core bits, so our diamond core bits have a stable drilling performance and superior lifespan. High diamond concentration yields excellent life and drilling efficiency through concrete, marble, granite, refractory brick and other hard materials. We use the grade A quality steel tube to ensure the drill bits run precisely.