Install and work with fragile materials using the Bosch tile drill bit set, with carbide tips for accurate results and durability. Heavily used by glass installers, plumbers, and general contractors. These Bosch glass bits are useful for bathroom and kitchen installations, allowing for precision drilling through tiles and glass pieces. The tip of each one is precision-ground and reinforced with carbide for best-in-class speed and less bit walking and greater durability. With three-flat shanks they fit securely in various drills. The set includes 1/8", 3/16", 1/4", and 5/16" Bosch glass bits.