Our Classic Framed Diamond, Private Residence Guard Dogs On Duty Sign can be attached to the door, wall or window of your home or business. The sign text and design work is laser engraved into sturdy plastic. Each sign comes with an adhesive foam backing, allowing them to be attached to any flat surface. Comes in multiple colors. Our Dog and Pet signs are great for your home or business. This is a great sign for your home security, let people know that your property is secured by guard dogs.