Our Classic Framed Diamond, Private Property Beware of Dog Sign can be attached to the door, wall or window of your home or business. The text and design work on this sign is laser engraved into sturdy plastic. Each sign comes with an adhesive foam backing, allowing it 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 security sign for your home or premises to let would be intruders know that the property is protected by a dog.