Diamond core drill bit, multi-layer welded hole opener, hole extension 20-35-50 mm

Unmatched Durability: Made of high-quality manganese steel with superior toughness and resistance to deformation, and diamond particles for long-lasting performance. This multi-layered, colored hole opener with a hole switch maintains its shape and functionality even under heavy use. 100mm Angle Grinder Mount: Our hole opener features an extended thread interface specifically designed for 100mm angle grinders. It can also be used with hand drills; a drive bar is required. Wide Application: This high-quality diamond drill bit is designed for extending, combing, and smoothing holes in hard materials such as marble, granite, quartz, tile, and concrete. Wet and Dry Operation: Designed for both dry and wet cutting. Dry cutting is ideal for quick tasks and indoor projects, while wet cutting reduces dust and heat, extends tool life, and ensures a smoother finish. Three hole sizes: The drill bit features a multi-layered tip and a three-level rice design. It includes three different sizes (20 mm, 35 mm, and 50 mm) to cover a wide variety of applications. They are the right size for the job.