12-Piece Core Drill Bit Set – Tile, Marble, Granite & Stone
12-Piece Core Drill Bit Set – Tile, Marble, Granite & Stone
Take on any hard-surface drilling project with confidence using this 12-Piece Brazing Core Drill Bit Set. Crafted from durable cobalt steel alloy, these hole-opening bits deliver clean, precise cuts through vitrified tiles, ceramics, granite, marble, glass, and stone — making them the go-to toolkit for DIY enthusiasts and professional tradespeople alike.
Made in Mainland China.
Why Choose This Core Drill Bit Set?
- Premium Cobalt Steel Alloy Construction: Coarse abrasive particles stay sharp longer, resist wear, and self-sharpen during use for consistently clean, neat openings.
- Large Chip-Removal Holes: Engineered chip-clearance ports evacuate debris quickly, reduce heat build-up, improve drilling efficiency, and significantly lower the risk of bit breakage.
- 12 Sizes in One Set: Includes 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 25 / 30 / 35 mm bits — the full range you need for bathroom fixtures, electrical conduit, plumbing pass-throughs, and decorative tile work.
- Truly Multi-Surface: Designed to drill through vitrified tile, ceramic, stone, granite, marble, and glass with equal effectiveness.
- Organized Storage Included: Every bit stores neatly in the included 200 × 150 × 50 mm carry box, so your set stays complete and ready for the next job.
Specifications
| Material | Cobalt Steel Alloy |
| Diameters | 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 25 / 30 / 35 mm |
| Quantity | 12 pcs / set |
| Color | Golden |
| Storage Box Size | 200 × 150 × 50 mm |
| Certification | CE |
| Country of Origin | Mainland China |
What's in the Box?
- 12 × Brazing Core Drill Bits (assorted sizes)
- 1 × Storage Box
Safe Drilling Tips
Always wear appropriate personal protective equipment (safety glasses, gloves, and dust mask) when drilling hard surfaces. Use water cooling where possible to extend bit life and reduce airborne dust. For more information on safe tool use and workplace safety standards, visit OSHA's Tools & Equipment Safety Resource.
Frequently Asked Questions
Q: What materials can these brazing core drill bits cut through?
A: These multi-purpose core drill bits are designed to work on vitrified tiles, ceramic tiles, granite, marble, stone, and glass. The cobalt steel alloy construction makes them suitable for a wide range of hard-surface drilling applications in both DIY and professional settings.
Q: Do I need water cooling when using these core drill bits on tile or stone?
A: Using water as a coolant is strongly recommended when drilling hard materials like granite, marble, or thick ceramic. It helps dissipate heat, extends the life of the bits, and reduces dust generation for a cleaner, safer work environment.
Q: What drill chuck is compatible with these brazing hole opener bits?
A: These core drill bits feature a standard round shank compatible with most corded and cordless power drills. Always ensure your drill's chuck capacity matches the shank diameter of the bit you intend to use for a secure fit.
Q: Are all 12 sizes included in a single purchase?
A: Yes! Each set includes all 12 sizes — 6, 8, 10, 12, 14, 16, 18, 20, 22, 25, 30, and 35 mm — along with a dedicated storage box to keep every bit organized and protected between uses.