Versatile Drilling Sizes: Engineered for , this diamond core drill bit effortlessly creates 20mm, 35mm, and 50mm diameter holes. Its stepped pagoda design simplifies the process by eliminating the need to switch bits, making it a perfect choice for diverse drilling needs on tough surfaces. and Efficiency: Featuring a , multi-layered tip and a three-stage reaming design, this drill bit cuts through hard materials like concrete, tile, and stone with ease. It ensures clean and accurate holes, enhancing your drilling efficiency and reducing time spent on projects. Robust Durability: Crafted from premium materials, this drill bit set offers outstanding durability and . It retains its cutting effectiveness even after extensive use, making it an ideal tool for both heavy-duty professional jobs and frequent DIY projects. Easy Installation and Use: This drill bit set is compatible with most standard drills and requires no special tools or advanced skills for operation. It's designed for easy attachment and use, allowing both professionals and DIY enthusiasts to achieve precise results effortlessly. Multi-Material Capability: The drill bit is exceptionally versatile and can penetrate a variety of materials including concrete, tile, marble, , quartz, and microcrystalline stone. It's an essential tool for a wide range of construction and home improvement tasks, ensuring reliable performance across different applications. colour: Gold material: Metal Package Contents: 2 x Hole expander 2 x rod Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.