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IRWIN 1/2-in Woodboring Auger Drill Bit $4.49 @lowes YMMV
2-in-1 design drills both the through hole and countersink for hex bolt and washer installation
Full screw-point tip, and auger flute design, allow for easy through hole drilling up to 9-in deep
1-7/16-in counter-bore to set washer
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kivfer posted this deal
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