I recently got this Makita set and have been very pleased with them for the price. The nice thing on this set is that it comes with a 1/2" bit, whereas the majority of hex-shank sets top out at 3/8.
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Makita B-65399 Impact Gold ...
Bosch CC2430 Clic-Change 1/4 in. Self-Centering Drill Bit Assortment (3-Piece)