Milwaukee 49-22-0175 8PC 6-Inch Versatile Universal Flat Boring Bit Set
WORKPRO 10-Piece Pro Spade Drill Bit Set- Black Coating, Premium Carbon Steel, Paddle Flat Bits for Woodworking, Assorted Bits 1/4" to 1-1/2" with Storage Case - Amazon.com
Milwaukee High Speed Wood Spade Bit Set with SPEED FEED Auger Wood Drilling Bit Set (17-Piece) 48-27-1520-48-13-0400 - The Home Depot