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: Industrial & Scientific
Spade Bits - Amazon.co.uk
Hardware House 51520 6 Piece Wood Spade Drill Bit Set - 3/8-Inch to 1-Inch Size Assortment - 6" Long with 1/4" Hex Shank to fit any drill - - Amazon .com