Electroplated Diamond Core Drill Bits Mainly used for drilling Glass, Marble, Granite, Tile, Ceramic and ... -ECDB204/520CPC-ECDB25125CPC-ECDB381-1/238CPC-ECDB451-3/445CPC-ECDB50250Electroplated Diamond Core Drill Bits Mainly used for drilling Glass, Marble, Granite, Tile, Ceramic and ...