Baumr-AG Diamond Core Drill Bit 53mm Concrete Wet Dry Tile Stone Brick MarbleBaumr AG Diamond Core Drill Bit 53mm Concrete Wet Dry Tile Stone Brick Marble Hit the ground spinning with the NEW Baumr AG 53mm Diamond Core Drill Bit. This heavy duty drill bit is suitable for penetrating super tough materials, including Concrete, Poroton, Cellular Concrete, Ytong, Marble, Bricks, Tiles, Granite, Stoneware and various other Masonry and Concrete surfaces. Its built with commercial grade steel to last the long haul, and its diamond