I am sometimes asked to recommend general purpose drill bits that can be purchased locally. Although this condition rules out many of the great brands available at online industrial suppliers, there are still a few decent options out there. By far, my favorite locally-sourced drill bits are Dewalt’s Pilot Point drill bits.
Pilot Point drill bits 3/16″ and larger all have a leading cutting edge that creates a smaller hole ahead of the bits’ flutes and primary cutting edge. This eliminates the need to drill pilot holes in a 2-step process, saving time and effort, and resulting in a more accurate hole.
These bits are suitable for use in wood, plastic, and metal. I often use these bits to drill through-holes in metals (mostly aluminum) and plastic (non-brittle types), but not for wood. The bits have split points so they don’t walk, and also no-spin shanks with three flats.
You can find these bits at local home improvement stores, as well as online at Amazon and most major tool suppliers.