Abstract: An apparatus is set forth for the precision aperture cutting through drywall in contemporary dwelling construction. The apparatus includes a self-contained, elongate housing defined by a rechargeable battery organization contained therewithin for selectively actuating a rotary cutting blade mounted by a rotatable shaft transversely of the housing, wherein the blade is offset relative to the housing and lies in a plane generally parallel to the axis of the housing. A modification of the instant invention includes a slidable positioning foot arrangement telescopingly receivable within a tubular sleeve for positioning the saw at a desired depth relative to the drywall and stabilizing the blade relative to the drywall surface.