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Impact Driver 101: When to Use an Impact Driver

From our Tool School series: Pro tips on choosing between an impact driver and a drill/driver

In this video, This Old House contributor Mark Clement explains the difference between a cordless drill/driver and an impact driver. An impact driver contains a different mechanism to drive the bit, so it can only use bits with a hex shank. An impact driver is both more compact and more powerful, but those advantages come at a cost: It's more expensive and considerably louder than a drill/driver.

Learn how to:
• Differentiate between a cordless drill/driver and an impact driver
• Understand the bit-driving mechanism
• Evaluate whether an impact driver is right for your project


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