Marble Core Drill Bits
Marble core bits are a hollow cylindrical bit that is the cutting part of a core drill. It leaves a Cylinder shape which often is used as sink holes or to feed lines and pipes. These core bits are made up of a concentration of diamonds and metal bonds in order to cut the hard surface of the granite. Marble core bits are occasionally Vacuum Brazed or Electroplated. The Diamond tool store offers two options, dry and wet.