Surface-mounted door knockers typically include the required mounting hardware, and the listings note that the hardware is not visible from the interior of the door.
The listings mention finishes such as Matte Black and brass, and note that the knocker surface is treated with a durable protective coating.
The waist shapers are described as knit garments made from nylon and polyester (82%/18%), with elastic straps, a hook-and-loop closure, three-breasted (three-hook) fastenings, and upgraded flexible steel boning for shaping.
The door knockers shown weigh about 1 to 1.1 pounds.
Listings mention elegant gift packaging and note that mounting hardware is included with the surface-mounted knockers.