Homedepot offers Milwaukee 4-Cutter SDS-PLUS Carbide Hammer Drill Bit Kit (5-Piece) for $20.97 (orig. $38.97) with free shipping.  

Product Description:

The Milwaukee SDS-PLUS 4-Cutter MX4 5-Piece Drill Bit Kit features solid carbide heads that deliver up to 5x longer life in concrete with rebar. Engineered with rebar guards to provide maximum durability