The Stinger Black Core Bit is equipped with vacuum brazing on not only the exterior but also inside allowing the core to easily fall out with no hassle. No waiting for the bit to cool down and pry that core out. As you're grinding away the core is being shaved down at the same time!

It also has holes on the top and bottom of the bit allowing it to stay cool if you wish to use it with a water-feed grinder.

The Stinger Black Core Bit has the perfect diamond bond to grind away at any Quartz or Granite slab that it comes face to face with.