Irwin 10506628 6x blue groove wood drill bit set of 6
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