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IRWIN® Blue Groove 6X Wood Bits are ideal for drilling wood and offer 6x faster drilling penetration than a standard flat bit.
The IRWIN® Blue Groove 4X Flat Bits have a patented groove point and cutting edge, designed to cut and not scrape the timber.
This set incorporates two drill countersinks and matching plug cutters.
HSS drill used for drilling all non-alloy materials.