High-quality Material: This 8-piece drill bit set offers exceptional durability and cutting performance, ensuring smooth and precise drilling in various hard materials such as glass, marble, granite, and porcelain. Versatile Use: Designed for masonry drilling, these drill bits are perfect for DIY tiling projects, allowing you to easily create holes for fixtures or decorations. The set includes a range of sizes from 6mm to 45mm to cater to different drilling needs. Precision Drilling: Each drill bit is equipped with a location drill bit feature, enhancing drilling accuracy by preventing slippage and ensuring the drill bit remains centered on the intended mark. This precision tool is ideal for both professional and home use. Safe and Efficient: With no high-concerned chemicals used in the manufacturing process, these drill bits are safe for both the user and the environment. The polishing stone coating reduces heat build-up during drilling, which prolongs the life of the bits and improves efficiency. Convenient and Reliable: Packaged in a sturdy case, the onmaiwei drill bits are easy to organize and transport. Originating from Mainland China, these tools meet rigorous quality standards, making them a reliable choice for your construction or renovation projects. Description: This 8-piece set of Polising-Stone-coated drill bits is perfect for a variety of drilling tasks, designed to handle materials such as glass, marble, granite, stone, porcelain, and ceramic tiles.The set includes a position drill for accurate, easy positioning, making it user-friendly for both novices and professionals. Encased in a durable plastic box, the drill bits are well-organized and portable, ideal for both home improvement and professional construction projects. Specifications: Packing size: 20cm x 15cm x 5cm Package weight: 592g Hole saw sizes: 18mm, 20mm, 25mm, 35mm, 45mm Position drill size: 6mm x 1 Frosted width: 10mm Adaptability: Compatible with angle grinders featuring M14 threads Pa