Drill bit set Makita D-42494 7 pc(s)

The Makita D-42494 7-piece drill bit set is designed for use with rotary hammers and heavy-duty drilling tasks. Each bit in the set measures 540 mm in length and features a flat chisel tip intended for efficient material removal and reliable performance in demanding applications. The set provides a consistent geometry across all pieces to maintain stable drilling behaviour when working in concrete, masonry and similar substrates.

Advantages

The set delivers extended reach with 540 mm length bits, allowing deeper holes and easier access in confined or recessed areas. Flat chisel tips provide effective percussion action for breaking and removing material while maintaining stable guiding during drilling. Manufactured to suit rotary-hammer use, the bits offer durability under repeated impact loads and maintain cutting geometry for consistent hole quality.

Suitable for

• Drilling through concrete and reinforced concrete
• Chiselling and breaking out material in masonry
• Installing anchors, dowels and through-holes at depth
• Working in renovation and construction sites where extended reach is required

Key specifications

• Number of pieces: 7
• Bit length: 540 mm
• Tip type: flat chisel
• Designed for: rotary hammer use
• Intended materials: concrete, masonry and similar substrates

How to use

Select a compatible rotary hammer and insert the chosen bit securely according to the tool manufacturer's instructions. Mark the drilling location, ensure stable positioning, and use the rotary hammer with appropriate percussion mode for masonry. Apply steady pressure without forcing the bit; allow the tool's percussion action to perform the cutting. Periodically withdraw the bit to clear debris and check hole depth. Wear suitable personal protective equipment such as eye protection, hearing protection and gloves while operating the tool.

Usage recommendations

Use bits of this length when deep anchor holes or working access require extended reach. Match the bit size and chisel type to the material and task; avoid using these bits in pure wood or metal drilling applications to prevent accelerated wear. Keep bits clean and inspect for damage after heavy use; replace any bit that shows excessive deformation or wear.