Irwin 10507764 blue groove power bit set 20 22 25mm
Irwin blue groove power bit sets irwin 10507764 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 10507764 blue groove power bit set 20 22 25mm