In masonry or metal, you'll get a lot of noise ... For those on a limited budget, sharpening drill bits by hand is also an option. All you need is a vise ($33 at Home Depot) and a flat file ...

As a professional woodworker, I'd much rather use my tools than sharpen them, but I know dull or broken bits are unavoidable. I've had a toolbox filled with old drill bits, so it was past time to ...