Drill bit set Makita D-42379 5 pcs

The Makita D-42379 5 pcs drill bit set is designed for use with rotary hammers and provides five 250 mm long bits including a flat chisel drill bit. The set is intended to deliver consistent drilling performance in masonry and concrete applications, combining length and robust construction to reach deeper drill positions while maintaining stability and control during use.

Advantages

The set offers uniform 250 mm length bits that simplify deep drilling tasks and reduce the need for multiple tool changes. Bits are made to withstand repeated impacts from rotary hammer mechanisms, providing wear resistance and a consistent cutting profile. The inclusion of a flat chisel drill bit increases versatility for light chiseling and widening of holes without changing to a separate chisel tool.

Suitable for

• Drilling holes in concrete and masonry
• Installing anchors and through-bolts at medium depth
• Renovation work requiring breaking or widening of drilled openings
• Professional construction and DIY projects using rotary hammers

Key specifications

• Quantity: 5 pieces per set
• Length: 250 mm for each bit
• Includes: standard drill bits plus one flat chisel drill bit
• Compatibility: designed for use with rotary hammers
• Material and construction: impact-resistant design suitable for hammer drilling

How to use

Insert the appropriate bit into the rotary hammer chuck according to the tool manufacturer's instructions and secure it before starting. Select a drill speed and hammer setting suitable for masonry or concrete, and position the bit perpendicular to the work surface to ensure straight holes. Apply steady pressure without forcing the tool; allow the hammer action to perform the cutting. For the flat chisel bit, use controlled lateral movements for light chiseling or widening of holes. After use, clean debris from the shank and store bits in a dry place to prevent corrosion.

Usage recommendations

Use appropriate personal protective equipment such as safety glasses, hearing protection, and dust mask when drilling in concrete or masonry. Match the bit diameter and length to the anchor or fastener being installed and inspect bits for wear or damage before each use to maintain safe operation.