WoodOwl 08808 Deep Cut Wood Boring Auger Bit, 18-Inch Length x 11/16-Inch Diameter Designed for making deep, smooth cuts in utility poles, railroad ties, pressure-treated lumber, wet or frozen wood. Coarse, burr-free lead screw for quick, on-target starts without material build-up. Unique twist design for clean chip removal, even in the deepest cuts. Teflon coated to resist heat and friction. Perfectly concentric for even and easy cutting of accurate diameter holes.