Irwin 49909 Power Drill Auger Bit, 9/16 in Dia, 7-1/2 in OAL, Solid Center Flute, 1-Flute, 5/16 in Dia Shank, Hex Shank

Full length heat-treated bit with 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. Single spur cutting edge scribes the circumference of the hole, coarse screw point provides fast boring in hard and soft woods. All bits have a 4-1/2 in twist length and a 7-1/2 in overall length.

• Solid center design provides extra rigidity while boring
• Solid center design provides extra rigidity while boring
• Wide lands keep the bit straight as it bores through the hole
• Single-spur cutting edge scribes the circumference of the hole for a smoother finish
• Coarse screw point provides fast boring in hard and softwoods
• Full length heat-treated bit guards against bending in heavy-duty applications and strengthens the twist where the greatest strain occurs
• 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