Professional-Grade Vacuum Brazed Diamond Drill Bit Set Upgrade your drilling experience with our vacuum brazed diamond core drill bits, designed for high-speed, clean, and precise drilling on porcelain tile, granite, marble, quartz, stone and dekton etc. Unlike traditional electroplated drill bits, our brazed diamond technology ensures exceptional durability and extended lifespan. What’s Included? ✔ 1/4'', 5/16'', 3/8", 4/5'', 1'', 1-1/8", 1-1/4", 1-3/8'', 1-3/4'', 2'', 2-1/2'' Diamond Drill Bits - Ideal for various hole sizes. ✔ Triangle shank design - Ensures easy installation on hand drills, bench drills, and tools. ✔ Portable suitcase - keeps your tools organized and easy to carry and store. ✔ EVA mould positioner - Ensures precise hole positioning for accurate drilling. Why Choose Our Drill Bits Set? Dry & Wet Drilling Options - Wax-filled of 1/4'', 5/16'' and 3/8'' drill bits allow dry drilling, while water cooling enhances performance. Minimal Chipping & Smooth Finish - Diamond-tipped edges prevent cracking. Multipurpose Use - Great for professional tile installation, plumbing, and DIY home projects. Whether you’re a professional contractor or a DIY enthusiast, this 11-piece diamond drill bit set is the perfect addition to your toolbox. User Tips: 1. Place the drill at a 45 angle; 2. Drilling till the hole start to form; 3. Bring the drill up into upright position; 4. Continue to drill and swaying the machine along a circle 【Premium Brazed Diamond Technology】Engineered with vacuum brazed diamond coating, our drill bits offer faster, cleaner, and longer-lasting performance compared to electroplated bits. Perfect for porcelain tile, ceramic tile, granite, marble, quartz and stone etc. 【Versatile 11-Piece Drill Set】Includes 1/4'', 5/16'', 3/8", 4/5'', 1'', 1-1/8", 1-1/4", 1-3/8'', 1-3/4'', 2'', 2-1/2''(6/8/10/20/25/28/32/35/45/50/65mm) Drill Bits for compatibility with electric drills. 【Smooth & Chip-Free Drilling】The precision diamond-tipped edges ensure clean and smooth holes with minimal chipping, while the wax-filled design aids in dry drilling without additional cooling. 【Wide Compatibility】The triangle shank design allows easy installation on hand drills, bench drills, and other tools, making it a must-have for both professional contractors and DIY enthusiasts. 【Perfect for Multiple Applications】Whether you’re installing bathroom fixtures, drilling sink holes, or working on tile and stone projects, this set is built for precision and durability.