Introducing the RS PRO dry diamond core drill bits. These core drills are manufactured using tool-grade steel and premium diamond grain. They feature a new fluted barrel and wide slots for easy, efficient removal of dust and debris plus a diamond turbo segment is set firmly into the metal core to ensure maximum strength and durability. RS PRO dry diamond core drill bits are compatible with most brands of power tools and provide excellent working life, speed & performance, the perfect hole saw for masonry and brickwork. There are 3 sizes available each with 150 mm lengths.