Drill Bits For Rock, Bricks and Masonry

These bits are a variation of the usual twist ones. The bulk of the tool is a relatively soft steel. An insert of tungsten carbide added to provide the cutting edges. It typically used with hammer drills. For tough work often use special shank shapes such as the SDS, which are very effective for installing wiring and plumbing in existing buildings.See the differences in construction in the article.

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