Electricians frequently must make holes inavariety of materials-easy-to-cut Sheetrock, wood, masonry, concrete and different types of metal with varying degrees of hardness—and many are beyond the capabilities of the conventional rotary drill. There are, however, specialized tools and cutting accessories made to quickly and efficiently drill into even the hardest substances while minimizing the amount of physical effort required. The most difficult cuts call for a hammer drill or rotary hammer.
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