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Blue-Groove point and cutting edge for faster chip removal. Double cutting spurs scribe the outside of the hole reducing breakout. 10\% larger shank for added durability.
AUGER DRILL BIT 1"
15/16x6 IRWIN SPADE BIT*********
11/16x6 IRWIN SPADE BIT
5/8x6 IRWIN SPADE BIT