Irwin 10507720 blue groove power bit set 14 16 18mm
Irwin blue groove power bit sets irwin 10507720 these blue groove wood drill bits 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 irwin 10507720 blue groove power bit set 14 16 18mm
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