5 Best Hammer Drills - Oct. 2021 - BestReviews
2018-5-7u2002·u2002It can accommodate masonry drill bits that are several feet long. However, the main difference between the two tools lies in the action. A standard hammer drill adds percussion to the drilling motion, banging the drill forward as it turns. A rotary hammer/SDS drill can use that hammering action on its own, without the drill.
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