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https://www.lowes.com/pd/IRWIN-1-…1000065073
https://brickseek.com/lowes-inven…1000065
2-in-1 design drills both the through hole and countersink for hex bolt and washer installation
https://brickseek.com/lowes-inven…1000065
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