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Bradfords£28.72Visit shop Irwin Granite Drill Bit Set 7 Piece Professional Masonry Drill Bits for Concrete and Stone
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The Irwin Granite Drill Bit Set is designed for professional contractors and dedicated DIY enthusiasts who require reliable performance when working with exceptionally hard materials like granite, natural stone, and concrete. This 7-piece collection offers a significant boost in operational life and hole accuracy thanks to its reinforced carbide construction, though it is specifically optimized for hard masonry and is not intended for drilling wood or metal.
| Model Part Number | 1329340 |
|---|---|
| Brand | Irwin |
No. These bits are specifically engineered for granite, concrete, and stone. Using them on metal or wood will result in poor performance and may damage the bit's cutting edges.
Yes, while they may work in standard rotary drills for softer materials, they are designed to perform best with the impact/percussion action of a hammer drill.
The set includes 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm, 10.0mm, and 12.0mm bits.
Store them in the provided case or a dedicated bit organizer to prevent the carbide tips from hitting other metal tools, which could chip them.
These bits use a standard round shank designed for 3-jaw chucks. They are not compatible with SDS-Plus hammer drills unless you use an SDS-to-chuck adapter.
Use a center punch to create a small dimple in the material before starting, or use a piece of painter's tape to help the bit grip initially.
Regularly clear the debris from the hole by periodically pulling the bit out while the drill is still spinning to prevent dust clogging.
Apply less downward pressure and ensure the drill is in the correct percussion mode. If the bit is dull, inspect the carbide tip for wear.
These bits are compatible with all standard 3-jaw chucks found on most corded and cordless hammer drills. To insert, open the chuck fully, slide the shank into the jaws, and tighten securely to prevent slippage during high-torque operation. After use, inspect the carbide tip for any signs of damage or debris build-up. Wipe the bits with a dry cloth to remove concrete dust and store them in a cool, dry place to prevent surface corrosion. Avoid using water to cool the bits during operation, as thermal shock can crack the carbide insert; let the bits air cool if they become excessively hot.
