CorePlus Diamond Dry Core Drill Bit 182mm x 150mm. Rated by us 5 out of 5. Professional quality core construction plus performance features deliver a smooth drilling experience. 8mm diamond segments with a high concentration of premium grade diamond in the bond. Leading edge diamond/metal bonding metallurgy for long lasting core life. Ribbed core body further aids the clearing of waste debris. 1/2in BSP threaded compatable with standard core drilling machines and accessories. CorePlus CORDCD182 Dry Diamond Core Bit 182mm, Steel. Our store cares about your experience – for any questions, we’re at your complete disposal!