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. Click here to watch the video.
Mark shares ‘When to use an Impact Driver’ with This Old House
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