Why you need an oscillating tool
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Three ways an oscillating tool can come in handy around the home:

Use this tool to scrape out carpet glue, saw through doorjambs, fit new planks, and then sand the tight corners around the new floor.

Grind out old grout from between bathroom tiles and scrape up worn caulk from the edge of a tub surround.

Use a small semicircular cutting wheel to make a clean plunge cut into drywall to install a new switch or outlet.