The Sutton Tools Sutton Tools Glass & Tile Drill Bit is designed for smooth drilling in up to Class 3 ceramic tiles, glass, brick, plastics and fibreglass. Its robust scotch pattern flute withstands the hardest wood drilling applications. The Specialised carbide tip and spiral flutes make these drills last 7 times longer and cut 30% faster than a standard glass and tile bit. Equippied with a 4 Facet diamond spear point that shaves rather than cuts for improved precision and penetration. These are longer in total length than standard tile bits for deeper drilling. Not suitable for toughened glass.