Diamond Drill Bit Set 6/8/10/12mm – Tile, Granite & Marble

Heavy-Duty Vacuum Brazed Diamond Drill Bit Set – 6, 8, 10 & 12mm

Take on the toughest masonry projects with confidence. This 4-piece vacuum brazed diamond drill bit set is engineered for clean, precise holes in porcelain, granite, marble, ceramic tile, glass, and other hard stone surfaces. Whether you're a professional tiler or a determined DIYer, these bits deliver the durability and performance you need.

Why Choose This Diamond Drill Bit Set?

• Vacuum Brazed Diamond Coating: Industrial-grade diamond grit is bonded directly to the steel shank via vacuum brazing — creating a stronger, longer-lasting bond compared to electroplated bits.
• Hex Shank Design: The hexagonal shank provides a secure, slip-free grip in standard power drills and drill presses, ensuring consistent, controlled drilling.
• 4 Versatile Sizes: Includes 6mm, 8mm, 10mm, and 12mm bits to cover a wide range of hole sizes for fixtures, anchors, hardware, and more.
• Multi-Surface Compatibility: Cuts through porcelain tile, ceramic, granite, marble, slate, travertine, and other hard masonry materials with ease.
• Center Drill Bit Style: Precision center-point tip helps prevent wandering, giving you accurate starts on smooth, hard surfaces.
• Heavy-Duty Construction: Built to withstand repeated use on demanding surfaces without losing sharpness quickly.

Product Specifications

• Sizes Included: 6mm, 8mm, 10mm, 12mm
• Shank Type: Hex (hexagonal)
• Bit Type: Center drill bit (vacuum brazed diamond)
• Material: Diamond-coated steel
• Application: Masonry drilling – porcelain, granite, marble, ceramic tile
• Country of Origin: Made in China

Pro Tips for Best Results

1. Use water as a coolant — keep the bit and surface wet during drilling to reduce heat build-up and extend bit life.
2. Start at low speed — begin drilling slowly to establish a groove before increasing speed.
3. Apply steady, moderate pressure — let the diamond grit do the work; excessive force can chip tile or damage the bit.
4. Use a drill guide or template on smooth, glazed surfaces to prevent slipping at the start.

Great For

• Bathroom & kitchen tile installations
• Granite countertop drilling (for faucets, fixtures)
• Marble flooring & wall projects
• Stone tile anchor and fastener holes
• General masonry and hard-surface DIY work

For additional guidance on safe power tool use, visit the OSHA Power Tools Safety Resource for best practices when working with drills and masonry tools.

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Frequently Asked Questions

Q: What materials can this diamond drill bit set cut through?

A: These vacuum brazed diamond drill bits are designed for hard masonry surfaces including porcelain tile, ceramic tile, granite, marble, slate, travertine, and similar stone or glass materials. They are not intended for use on wood or metal.

Q: Do I need a special drill to use these bits?

A: No special drill is required. The hex shank is compatible with most standard power drills and drill presses that accept hex-shank bits. For best results, use a variable-speed drill so you can start at a low RPM and increase gradually.

Q: Should I use water when drilling with diamond bits?

A: Yes — using water as a coolant is strongly recommended. It reduces heat build-up on the bit and the tile surface, which extends the lifespan of the diamond coating and helps prevent cracking or chipping of the material being drilled.

Q: What sizes are included in this set?

A: This set includes four drill bits: 6mm, 8mm, 10mm, and 12mm — covering the most common hole sizes needed for tile and masonry work, such as installing towel bars, shower fixtures, anchors, and cabinet hardware.

Q: How long will these diamond drill bits last?

A: Longevity depends on the hardness of the material, drilling speed, pressure applied, and whether cooling water is used. Vacuum brazed diamond bits generally last significantly longer than electroplated alternatives due to the stronger diamond-to-steel bond. Following the pro tips above will maximize bit life.