Irwin - 3/4″, 5/16″ Diam Straight Shank, 7-1/2″ Overall Length with 4-1/2″ Twist, Solid Center Auger Bit - 05528351 - MSC Industrial Supply
Masendelk Ship Auger Drill Bit 1/2 x 12 Inch, Wood Auger Bit with 3/8 Inch Hex Shank - Amazon.com
QWORK Auger Drill Bit for Wood, 1/2 Inch Diameter x 12 Inch Length, 3/8-Inch Hex Shank, Long Drill Bits - Amazon.com
SOMADA Long Auger Drill Bit Set for Wood -5 Pcs, 3/8-Inch, 1/2-Inch, 5/8-Inch, 3/4-Inch, and 1-Inch Diameter with 12-Inch Long Hex Shank, Ship Auger Bit Set: Amazon.com: Tools & Home Improvement
1-1/8"x7-1/2" Auger Bit | DMS73-0012 | DrillsandCutters.com