The Metabo 627626000 8.5mm concrete drill bit is made from a metal-bonded cemented carbide material, providing strong and durable performance even in the toughest of materials. It is designed to penetrate up to 85mm (3.5") into concrete, masonry, stone, and other abrasive materials, cutting through one material and continuing on to another in one action. The bit has a shank diameter of 5mm and a total length of 85mm. Furthermore, the bit is coated with a special anti-wear fully-coated material with an optimum drill angle, ensuring long life, clean drilling and fast work progress.