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1mm (without sleeve)
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7 x Flat Bits: 1
Windows (number):5
- Manufactured from Chrome Vanadium
Irwin® Speedhammer Quad Drill Bit 12.0 x 310mm 28-B5-A_ZBLU 1mm (without sleeve)The IRWIN Speedhammer Quad Drill Bit is ideal for drilling plug and anchor holes in masonry, all types of stone and concrete. Its 4 cutter geometry, drills a more concentric hole for the best fixing retention. The full head carbide tip offers the highest levels of drilling life and durability. A unique bonding system connects the solid carbide head to the 4 flute spiral. This design provides faster, more efficient dust removal. The specially
