Three Size Diamond Step Drill Bit Set Pro Grade Heavy Duty 20mm 35mm 50mm Diamond Core Drill Bits For Marble Tile Concrete Granite Quartzite With M10 Thread Durable Diamond Coating For Fast Clean Holes And Easy Hole Opening

Three-Size Diamond Core Drill Bit Set for Fast Holes
✔️ Three drilling sizes: 20mm, 35mm, 50mm with M10 thread adapter

This three-size diamond step drill bit set includes 20mm, 35mm, and 50mm bits designed for fast, clean holes in concrete, tile, marble, granite, quartzite, and microcrystalline stone. Durable diamond coating keeps a sharp edge for long life, and the M10 thread interface lets you attach to a 100mm angle grinder or use the included conversion rod for handheld drills, making it a handy choice for both professional work and DIY renovations.

✅ 20mm, 35mm, 50mm sizes for versatile hole diameters
✅ Diamond-coated edges for rapid cutting in hard materials like concrete and tile
✅ M10 thread plus conversion rod for easy attachment to grinders and drills
✅ Drilling, expanding, chamfering, and polishing in one tool

💡 What is a three-size diamond core drill bit set used for in masonry and tile work? Handy for precise holes and faster remodeling.
- Precise hole expansion from 20mm to 50mm
- Works on concrete, tile, marble, granite, quartzite
- Attaches to M10 angle grinders with the included adapter
- Convertible rod lets handheld drills run the bits