IRWIN Installer Drill Bit for Wood, Straight Shank, 18-Inch x 5/8-Inch (1890713) - 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
Milwaukee 1/4 in. - 1-3/8 in. #5 Black Oxide Step Drill Bit (10-Steps) 48-89-9205 - The Home Depot