,diamond segment for core drill 1.For core drill 2.For grante,marble,limestone,sandstone,ect. 3.High performance 4Customized ,diamond segment for core drill◊ Product information1. For grante , marble, limestone, sandstone,ect.2. Used for diamond core drill3. Any sizes are available as requied.4. High performance5. Durable ◊ Workshop ,diamond segment for core drill