Masonry drill bit KWB 5 mm (model 421005) – 1 pc

kwb 421005 masonry drill bit with a 1/4" hexagon shank designed for use with cordless and mains drills as well as bitholders. The 5 mm diameter bit features a tungsten carbide tip brazed at high temperature and a smoothly formed half‑round spiral for efficient waste removal. The shaft is phosphated to resist corrosion and the bit is suitable for drilling into masonry, natural and artificial stone, and limestone.

Advantages

The 1/4" hexagon shank to ISO 1173 (E 6.3) ensures secure seating in chucks and quick bit changes. Tungsten carbide tip provides wear resistance and maintains cutting performance in abrasive materials. The half‑round spiral flute optimizes dust extraction for cleaner, faster drilling. Phosphated surface treatment improves corrosion resistance during storage and use.

Suitable for

• Drilling holes in masonry (brick, block, concrete)
• Drilling into natural stone and artificial stone
• Drilling into limestone

Key specifications

• Type: Masonry drill bit
• Shank: 1/4" hexagon (ISO 1173 E 6.3)
• Tip material: Tungsten carbide, high‑temperature brazed
• Diameter: 5 mm
• Flute: Half‑round spiral for waste removal
• Surface finish: Phosphated
• Quantity: 1 piece

How to use

Secure the drill bit in a compatible 1/4" hex chuck or bitholder. Select an appropriate drill and speed for masonry materials and apply steady pressure while allowing the bit to cut; avoid excessive side load. Withdraw periodically to clear debris and allow dust removal through the spiral flute. For deeper holes, clear the bore frequently to maintain drilling efficiency.

Usage recommendations

Use appropriate personal protective equipment (safety glasses, dust mask) and, where possible, use dust extraction or wet drilling to reduce airborne particles. Match drill speed to the material: moderate speeds for masonry and stone. Replace the bit when the carbide tip shows significant wear to maintain drilling quality.