Amazon has the 8-Piece WORKPRO SDS-Plus Drill Bit Set w/ Carbide Tip on sale for $20 with free shipping on $35+ or with Prime. Set includes: 1/4 X 4-inch, 5/16 X 4-inch, 3/16 X 6-inch, 9/32 X 6-inch, 1/4 X 6-inch, 5/16 X 6-inch, 3/8 X 6-inch, 1/2 X 6-inch.