The Jonard Tools AHC-10 Adjustable Round Hole Cutter is designed for cutting round holes from 2.2 to 10" diameters in ceilings, walls, and floors and is the perfect tool for installing recessed speakers, lighting, or other round objects. The AC-10 cuts plywood, sheetrock, plasterboard, and acrylic sheets up to 1.06" thick, and it features a transparent dust shield for eye protection and a compression spring that absorbs vibrations while cutting. A carry case is included.