The CYL-9 Ceramic Tile and Glass Drill Bits are professional quality, produced for intensive use. They can be used dry without lubrication, working with these bits is effortless and convenient. The simple flute-less design is especially suitable for drilling through soft to medium-hard ceramic tiles or non-toughened glass. The bit is compatible with corded or cordless non-impact drills. Drill without impact at low speed.