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