Into Existing Outlets Equipped with Powerful Rare-Earth Magnets Perfect Drywall Cutouts for EXISTING Outlets with NO Measuring Hang It once, cut It right! You'll never have to measure and cut, and measure and re-cut again. Unlike “press-to-mark” drywall marking methods, you only have to lift drywall into place one time using Fug Mark. Perfect for Yids or Pros, the Plug Mark is used for rehab or drywall replacement installations when electrical receptacles have already been installed.