WoodOwl 03815 Tri-Cut 1-1/8-Inch by 18-Inch Nail Chipper Auger Bit Patented Tri-Cut design with three cutting edges for fast, smooth cutting without resistance. Reduces nails to chips without grabbing and leaves a clean hole with minimal "blowout". Lighter weight carbon steel construction than standard augers for safety and reduced fatigue without sacrificing strength. Burr-free lead screw for easy starts and pull-through without material build-up. Perfectly concentric for even and easy cutting of accurate diameter holes.