Multiple Sizes Available: This product includes 5 hex shank hole saws and 5 hex shank drill bits, each in different specifications; The hole saws include 2 with a diameter of 1/4" (6mm), and 1 each with diameters of 5/16" (8mm), 3/8" (10mm), and 1/2" (12mm); The drill bits include 1 each with diameters of 3/16" (5mm), 1/4" (6mm), 5/16" (8mm), 3/8" (10mm), and 1/2" (12mm); The variety of sizes and models can meet most of your work requirements, making it an ideal choice for you High-Quality Materials: The hole saws are made of premium diamond material, while the multifunctional hex shank drill bits are made of carbide; These materials offer high hardness, wear resistance, and corrosion resistance, making them durable and suitable for cutting and drilling hard materials like bricks, quartz, tiles, and marble; Diamond's excellent thermal conductivity effectively dissipates heat, ensuring the tool maintains stable performance even in high-temperature environments Equipped with Cooling Wax: The hole saw is equipped with cooling wax at the tip, and the drill bit is pre-lubricated, allowing for drilling without the need for water cooling; The thickened diamond coating enhances its durability and robustness; This not only extends the tool's lifespan but also increases work efficiency, reducing the frequency of tool replacements and associated costs; Additionally, the clear size markings on the tools make it easy to quickly select the required tool Wide Range of Applications: Due to its excellent hardness and wear resistance, this multifunctional diamond drill bit set is widely used for drilling and cutting hard materials like concrete, bricks, and stones; With this drill bit set, you can handle more types of materials, making it suitable for both construction and engineering machinery fields, thereby enhancing your work efficiency Exquisite Box Packaging: Comes with a compact storage box for easy access; The box opens and closes by sliding the red plastic block on the side up and down, with a similar sliding mechanism for the red plastic piece on the back, making it portable and space-saving; The transparent front design allows for a clear view of the tools, offering both functionality and elegance This product is made of high-quality materials and offers superior performance. Its high hardness and wear resistance make it capable of easily handling various materials, making it an ideal choice for your drilling needs.