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Home Depot has Bosch Daredevil High Carbon Steel Standard Spade Bit Set (9-Piece) for $8.55. Shipping is free.Drills up to 10x faster in wood, plywood than standard spade bits
Features 1/4 in. hex shank, and it fits a wide variety of drills
Features full-cone threaded tips and contoured paddles for speed
https://www.homedepot.com/p/Bosch…/305462523