- 3-in-1 Stepped Hole Design: This diamond drill bit features a unique triple-step cutting structure (20mm, 35mm, 50mm), allowing you to expand holes seamlessly with just one tool. Perfect for precision drilling in tight spaces or at varying depths, it enhances your efficiency. - Optimized for Tough Surfaces: Built for maximum durability, this core drill bit effortlessly tackles a wide range of hard materials, including tile, marble, engineered stone, quartz, granite, and concrete. It is a versatile choice for both indoor and outdoor drilling projects. - Sharp Multi-Layer Cutting Edge: The diamond-coated, multi-layer tip provides exceptional abrasion resistance and smooth cutting performance. This design ensures a longer service life and minimizes wear, even during extensive heavy-duty use. - Compatible with Standard Drills: This diamond hole saw bit fits most handheld electric drills, making it user-friendly and accessible. No special tools are required, catering to professionals, contractors, and DIY enthusiasts alike. Use Cases: 1. Create precise holes for plumbing or electrical installations in tiles or concrete walls. 2. Efficiently cut through marble countertops for seamless sink installations. 3. Drill clean holes in engineered stone surfaces for decorative fixtures or lighting. This diamond drill bit is the reliable solution you need for all your drilling tasks, combining functionality, compatibility, and performance in one tool.