The Metabo 631831000 is a metal-cutting drill bit designed for use in concrete, stone, and other wall, brick type materials. It features a carbide tip head with a 4-flatted shank for improved grip in the chuck of your drill. The blade is made from special heat-treated steel for high chip removal rates, and it is ribbed at the base for more stability when drilling. The tip is slightly offset from the shank for improved drilling accuracy. It is suitable for a variety of materials and applications, including drilling in masonry, cured concrete, cinder block, stone, and other similar materials.