Irwin 49904 Industrial Tool 1/4-in X 7-1/2-in Dual Auger Wood Boring Bits

For use in 3/8-in or larger electric drills and hand braces Solid center design provides extra rigidity while boring Wide lands keep the bit straight as it bores through the hole The flutes are ground behind the lands to funnel chips to the inside of the bit and away from the outside diameter, producing a faster, cleaner cut Single-spur cutting edge scribes the circumference of the hole for a smoother finish Full-length heat treated bit guards against bending in heavy-duty applications and strengthens the twist where the greatest strain occurs Coarse screw point provides fast boring in hard and soft woods 4-1/2-in twist length and a 7-1/2-in overall length Carded 1/4-in diameter