General description Dry diamond hole saw drills are designed for cutting through the hardest materials such as glass, porcelain, tiles, ceramics, granite, and marble. This complete kit includes seven dry drill bits in various sizes to meet your different needs. Technical specifications Sizes included: 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm Material: Electroplated emery High temperature quenching for increased hardness Designed for stability and reduced shaking during use Usage Ideal for dry drilling without the need for water Suitable for a variety of materials including granite, marble, masonry, concrete, tiles, ceramics, glass, and hard plastic