Feature: 1. Excellent Durability: Constructed from excellent 45 steel, this tile drill bit set is designed to withstand rigorous use. The electroplated finish ensures that the bits maintain their integrity over time, while the thick coating on the top provides added cutting strength, extending the lifespan of the tools. 2. Good Cutting Strength: The combination of 45 steel, soldering technology, and the thick coating results in excellent cutting performance. This drill bit set boasts excellent cutting strength, enabling slick and accurate drilling through tough materials, making it a good choice for both professionals and handcraft enthusiasts. 3. Versatile Application: This tile drill bit set is suitable for a variety of drilling needs in both professional and everyday settings. It is specifically designed to work efficiently with a wide range of hard and brittle materials, including tiles, ceramics, glass, marble, granite, and terrazzo, making it an essential tool for any project. 4. Dry And Wet Cutting Capability: The drill bits can withstand high temperatures without requiring water as a coolant, making them effective for dry cutting tasks. However, for optimal performance and to prolong the lifespan of the bits, using water as a coolant is recommended, helping to keep the drill bits cool and incisive during use. 5. Accurate Drilling Guidance: The included tile drilling guide is made from high density EVA, ensuring rain proof and robust construction. This guide provides accurate and stable drilling positions, preventing slipping or misalignment, which can lead to damage or inaccurate holes, thus ensuring an excellent drilling experience every time. Specification: Item Type: Hole Saw Drill Bit Set Material: 45 Steel Cutting Depth: Approx. 45mm / 1.77in Shank Diameter: Approx. 10mm / 0.39in Round shank Size: 6mm / 0.24in, 8mm / 0.31in, 10mm / 0.39in, 12mm / 0.47in, 14mm / 0.55in, 16mm / 0.63in, 18mm / 0.71in, 20mm / 0.79in, 22mm / 0.87in, 25mm / 0.98in, 28mm / 1.1in, 30mm / 1.18in, 35mm / 1.38in, 40mm / 1.57in, 42mm / 1.65in, 45mm / 1.77in, 50mm / 1.97in, 55mm / 2.17in, 60mm / 2.36in. Package List: 19 x Hole Saw Drill Bits 1 x Storage Box