Weha Matrix Dry Diamond Core Bit is an outstanding high speed core bit for granite, engineered stone, quartz, and concrete counter top materials.

With a high diamond concentration of diamonds, the Weha Matrix Granite Core Bit will equal the same cost per hole as the most expensive granite core bits on the market.

Additionally the side diamonds allow the hole to be easily expanded very fast with the vacuum brazed diamonds.

At 3 3/4" in total length, the Matrix Granite Core Bits will be perfectly stable for "biting" into the stone and for drilling free hand with the makita grinder. This 3 3/4" length gives just enough depth to drill through 2cm, 3cm granite and stone without any problems.

The Weha Matrix Diamond Granite Core Bits was specifically designed for drilling free hand. The Matrix Diamond Core Bit has very sharp diamond lines to start the drilling on the stone at an angle without skipping across the stone. The strong solid welding is also made for the circular motion when drilling in the hole to speed up the coring and drilling process.

Weha really thought through the real world drilling process and produced one of the best granite core bits for granite and engineered stones at one of the best prices one could ask for.