Irwin I-100 series solid center auger bit for boring clean, accurate holes in hard and soft woods. The solid center design adds rigidity while boring, and the bit is heat treated along its full length to guard against bending and to strengthen the twist where the greatest strain occurs.

• Solid center design provides extra rigidity while boring
• Coarse screw point pulls the bit in for fast boring in hard and soft woods
• Single spur cutting edge scribes the circumference of the hole for a smoother finish
• Wide lands keep the bit straight as it bores through the hole
• Flutes ground behind the lands funnel chips away from the outside diameter for a faster, cleaner cut
• Full length heat treated to guard against bending in heavy-duty use
• 5/8" cutter, 4-1/2" twist length, 7-1/2" overall length
• Hex shank for use in 3/8" or larger electric drills and hand braces