7 Piece Diamond Dry Core Drill Bit Kit + 162mm Core bit separately. A-taper pilot drill 10 x 200mm. SDS-plus extension adaptor 10 x 200mm. Hex extension adaptor 12 x 200mm. In a sturdy aluminum storage case. Ompatible with the kit 162mm Core bit separately. 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. Latest’V’ groove segment design enables fast clearing of debris allowing a continuous fast cutting action. Ribbed core body further aids the clearing of waste debris. Aerated core design enhances cooling and extends core life. 1/2in BSP threaded compatable with standard core drilling machines and accessories.