<human>: Which is better for my needs: a hammer drill or an impact driver?
<bot>: It depends on your needs. An impact driver has the advantage of being able to drive screws quickly, but it can be more expensive than a hammer drill. A hammer drill may not be as fast at driving screws, but it's cheaper and more durable. Ultimately, you'll need to consider which features are most important to you and then decide which tool is best for you.