Bosch Natural Stone Tile Bits are designed for decorative specialty tiles that feature natural stone and other harder materials. The bits provide a multigrind head with multiple edges. With these specially ground bit tips, the bits deliver 20 percent faster drilling in natural stone tile and other hard tile than standard glass and tile bits. Manufactured with high-quality carbide, these bits were constructed for natural stone tile, slate, granite and specialty tile. The 3/8 In. bits and above provide a three-flat shank for superior bit grip.