General description Enter the spinning mill floor with a NEW diamond core drill. These high-performance drill bits are designed to penetrate extremely hard materials such as concrete, aerated concrete, marble, brick, tile, granite, sandstone, and various other masonry and concrete surfaces. Technical specifications Cutting diameter: 63 mm Length: 450 mm Shaft material: commercial steel with diamond cutting teeth Cutting tooth material: diamond/steel mix Length of cutting teeth: 10 mm Thread connection: 22 mm