• Drilax Diamond Hole Saw Drill Core Bit Heavy Duty Wet and Dry Use 3-1/2 for Brick, Concrete Block, Masonry 2 inches Depth of Cut - 3/8 inch Standard Shank DrilaxHD010090
  • 3-1/2 inch Diamond Hole Saw Concrete Heavy Duty Gold Series
  • 3-1/2 inch Diamond Hole Saw Concrete Heavy Duty Gold Series
  • 3-1/2 inch Diamond Hole Saw Concrete Heavy Duty Gold Series
  • 3-1/2 inch Diamond Hole Saw Concrete Heavy Duty Gold Series
  • 3-1/2 inch Diamond Hole Saw Concrete Heavy Duty Gold Series
  • 3-1/2 inch Diamond Hole Saw Concrete Heavy Duty Gold Series
  • 3-1/2 inch Diamond Hole Saw Concrete Heavy Duty Gold Series
  • Drilax Diamond Hole Saw Drill Core Bit Heavy Duty Wet and Dry Use 3-1/2 for Brick, Concrete Block, Masonry 2 inches Depth of Cut - 3/8 inch Standard Shank DrilaxHD010090
  • Drilax Diamond Hole Saw Drill Core Bit Heavy Duty Wet and Dry Use 3-1/2 for Brick, Concrete Block, Masonry 2 inches Depth of Cut - 3/8 inch Standard Shank DrilaxHD010090
  • Drilax Diamond Hole Saw Drill Core Bit Heavy Duty Wet and Dry Use 3-1/2 for Brick, Concrete Block, Masonry 2 inches Depth of Cut - 3/8 inch Standard Shank DrilaxHD010090
  • Drilax Diamond Hole Saw Drill Core Bit Heavy Duty Wet and Dry Use 3-1/2 for Brick, Concrete Block, Masonry 2 inches Depth of Cut - 3/8 inch Standard Shank DrilaxHD010090
  • Drilax Diamond Hole Saw Drill Core Bit Heavy Duty Wet and Dry Use 3-1/2 for Brick, Concrete Block, Masonry 2 inches Depth of Cut - 3/8 inch Standard Shank DrilaxHD010090
  • Drilax Diamond Hole Saw Drill Core Bit Heavy Duty Wet and Dry Use 3-1/2 for Brick, Concrete Block, Masonry 2 inches Depth of Cut - 3/8 inch Standard Shank DrilaxHD010090
  • Drilax Diamond Hole Saw Drill Core Bit Heavy Duty Wet and Dry Use 3-1/2 for Brick, Concrete Block, Masonry 2 inches Depth of Cut - 3/8 inch Standard Shank DrilaxHD010090
  • Drilax Diamond Hole Saw Drill Core Bit Heavy Duty Wet and Dry Use 3-1/2 for Brick, Concrete Block, Masonry 2 inches Depth of Cut - 3/8 inch Standard Shank DrilaxHD010090
1 16

Drilax

3-1/2 Inch Dry Core Diamond Hole Saw for Brick & Concrete

3-1/2 Inch Dry Core Diamond Hole Saw for Brick & Concrete

Conquer demanding installation tasks with the Drilax 3-1/2 Inch Heavy Duty Masonry Diamond Hole Saw. Engineered with laser-welded sintered diamond technology, this 3-1/2 inch bit provides aggressive cutting power for both wet and dry applications. Whether you are a professional contractor or a dedicated DIYer, this tool offers a cost-effective, high-performance solution for drilling through concrete, brick, and stone foundations.

$39.94 USD
$47.94 USD $39.94 USD
Sale Sold out
FREE Shipping

The Drilax 3-1/2 Inch Diamond Core Drill Bit is an exceptionally versatile and heavy-duty tool engineered for professionals and serious DIYers. This masonry hole saw provides unparalleled performance for precise and efficient drilling through the toughest materials. As a dedicated dry core bit, it excels at creating clean, accurate holes in concrete, brick, cinder block, and other demanding masonry surfaces without the constant need for water cooling.

Benefits

Cost Efficiency: Save over 80% compared to hiring professional core drilling services by using your existing tools.

Universal Compatibility: The 3/8 inch shank fits standard cordless and corded drills, as well as upright drill presses.

Heavy-Duty Construction: Designed for professional-grade results, ensuring long-lasting use and consistent, high-quality hole creation in abrasive environments.

Professional Precision: Engineered for accurate, wander-free drilling, allowing you to achieve perfectly sized holes for critical installations.

Compatible Materials

  • Materials: Brick walls, concrete blocks, stucco, foundation slabs, natural stone, cinder block, and pavers.
  • Tool Compatibility: Works with all standard 3/8" or 1/2" corded and cordless drills (DeWalt, Milwaukee, Ryobi, Makita).
  • Pro Series Tip: For sizes in this series that do not include a guide, we recommend creating a simple template out of scrap wood to ensure a perfect start.
  • Warning: Not recommended for glass, mirrored surfaces, or delicate decorative tiles.

How To Use

  • Drill Mounting: This bit features a universal 3/8 inch shank that fits directly into any standard corded or cordless power drill. No specialized adapters are required.
  • Starting the Cut: Since this model does not include a mechanical guide, we recommend creating a simple guide template out of scrap wood or plastic. Alternatively, start the cut at a 45-degree angle to notch the surface, then slowly bring the tool upright to 90 degrees.
  • Operating Technique: Use a steady, moderate speed. Apply light, controlled pressure and let the sintered diamond teeth do the cutting. Do not use the hammer setting on your drill.
  • Heat Management: Although engineered for dry use, using a wet sponge or a small stream of water will keep the bit cool and significantly reduce dust.
  • Safety Note: Avoid contact with rebar. If rebar is encountered, stop drilling immediately to prevent damage to the sintered teeth.

Use Cases

  • HVAC & Ventilation: Perfect for drilling entry points for 3-inch or 3-1/2 inch exhaust vents, ventilation ducting, and air intake systems.
  • Plumbing & Drainage: Ideal for passing large-diameter drain pipes and stack lines through concrete blocks and foundations.
  • Electrical Utilities: Create clean passages for oversized conduit bundles or electrical service entrances in masonry walls.
  • Renovations & DIY: Tackle basement plumbing upgrades, dryer vent installations, and structural support drilling with confidence.

Technical Specifications

  • Hole Diameter: 3-1/2 inches
  • Cutting Depth: 2 inches
  • Shank Type: 3/8 inch Universal Round Shank
  • Construction: Solid Steel Body with Laser-Welded Sintered Diamond Teeth
  • Locator Guide: Not Included (Use scrap-wood template)
  • Use Type: Dry or Wet Core

F.A.Q.

Q: What materials can this 3-1/2 inch hole saw cut?
A: It is designed for heavy-duty masonry, including concrete blocks, brick, stone foundations, pavers, marble, and granite.
Q: Does it require a pilot hole?
A: No. Center pilot bits are primarily for wood or metal. These diamond masonry bits are designed for direct drilling. Use a template or the angled-start method to keep the bit on target.
Q: Can I use this with my cordless drill?
A: Yes. The 3/8 inch shank is the standard size for most cordless and electric hand drills.
Q: What is the maximum drilling depth?
A: This bit is optimized to drill up to 2 inches deep, making it ideal for passing through standard foundation walls and masonry blocks.

Shipping & Returns

All DRILAX orders are fulfilled directly from our New Jersey headquarters or a regional warehouse strategically located near you. We offer Free Shipping on all orders with no minimum purchase required. Most customers receive their precision tools within 2-3 business days, ensuring your project stays on schedule.

We have a 30-day return policy.

View full details