Craftsman 20919 13-Piece Spade Bit Set with Metal Storage Rack for $8.50.  Order online for in-store pickup at Sears to lock in the price and save on shipping.  Otherwise, shipping is $6.50 for a total of $15.00 shipped.  Here is a screenshot for your reference.  The set includes a 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", [...]