Masonry Drill Bit Irwin 4 x 80 mm — SDS-plus compatible, carbide tip

The Irwin masonry drill bit 4 x 80 mm is designed for drilling into concrete, brick and other masonry materials. It has a 4 mm cutting diameter and an 80 mm overall length with a carbide tip that improves wear resistance and maintains cutting performance during repetitive drilling. The shank is compatible with SDS-plus hammer drills and similar chucks, providing secure seating and efficient energy transfer for rotary-percussive drilling in hard substrates.

Advantages

The carbide tip delivers long-lasting edge retention and effective chiselling action in dense masonry, reducing the need for frequent replacement. SDS-plus compatibility ensures stable fixation in hammer drills and consistent drilling depth control. The compact 4 mm diameter allows precise holes for anchors, dowels and fasteners while the 80 mm length gives sufficient embedment and clearance for most small-to-medium anchoring tasks.

Suitable for

• Drilling holes for wall anchors and dowels in concrete and brick
• Installing fasteners for fixtures and light fittings on masonry
• Creating pilot holes for masonry screws and plugs
• General-purpose hammer drilling in renovation and construction

Key specifications

• Material: carbide-tipped cutting head
• Application: masonry, concrete and brick
• Diameter: 4 mm
• Overall length: 80 mm
• Shank type: SDS-plus compatible
• Drilling method: rotary-percussive (hammer drill)

How to use

Select the appropriate drill speed and hammer setting on the SDS-plus hammer drill according to the substrate. Mark the drilling point, secure the workpiece if needed, and insert the bit into the drill’s chuck until it locks. Start drilling with light pressure to position the bit, then apply steady forward pressure while allowing the tool’s hammer action to break the material. Withdraw the bit occasionally to clear dust and prevent overheating. After reaching the required depth, retract the bit and clean the hole before inserting anchors or fasteners.

Usage recommendations

Use personal protective equipment such as safety glasses, hearing protection and dust mask when drilling. For reinforced concrete or larger diameters, consider using a larger-diameter bit or a dedicated breaker bit. Replace the bit when cutting performance degrades or when the carbide tip shows visible wear to maintain clean holes and reduce load on the drill.