With two adjustable blades, these saws cut a variety of hole sizes in ceilings, walls, floors, and other surfaces made of drywall, plaster, plastic, and wood. They’re useful for installing cylindrical objects, such as cables, columns, recessed lighting, and in-wall speakers. To block flying chips and collect dust, they have a clear debris shield. A rubber seal on the shield maintains contact with the surface you’re cutting to prevent damage to the material and help contain debris. Power these saws by attaching them to your drill press or portable drill.