Bosch 3/8" Natural Stone Tile Bit is a high-speed steel masonry drill bit specifically designed for drilling in hard materials such as natural stone tiles, slate, granite, and other specialty tiles. It features multiple cutting edges for faster drilling, a specialized carbide tip for longer life, and a centered design for no-skate drilling and greater ease of use. This drill bit is compatible with hammer drills and is not recommended for use on porcelain tiles.