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Impact Driver 101: How to Use the Power Selection Switch

Pro tips on matching the power level to the fastener

In this video, This Old House contributor Mark Clement explains how to properly use the power selection switch on the impact driver.

The "slow" setting is ideal for driving smaller screws, while the "medium" setting helps when slightly more power is needed but you want to conserve the battery. Choose a high-power setting for driving longer or larger fasteners.

Learn how to:
• Switch or toggle between power settings
• Determine which setting is best for your project
• Avoid stripping a screw or breaking off a screwhead