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″ Twist length and a 7-1/2″ Overall length.
From the Manufacturer
Irwin Industrial Tools 49905 5/16-Inch I-100 Auger. For fast, rough or clean and exact holes, Irwin’s extensive line of woodboring drill bits provide the user with the best available tools for each application in achieving their wood drilling needs.
