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Irwin 10506628 6X Blue Groove Wood Drill Bit Set of 6 Irwin 10506628 P The drill bits in this Blue Groove set have a 6x faster penetration than a standard flat bit Each bit has been fully heat treated for extra durability The Tri flute tapered flute design gives faster chip ejection and less binding during use P Irwin 10506628 6X Blue Groove Wood Drill Bit Set of 6
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