The Tudor Collection 19mm Door Stud is perfect for anyone trying to make their home look more rustic. Adding these studs will give any door a real authentic feel and this is achieved with a simple bit of decoration. The door studs are made from wrought iron and have matt black powder coated finishes. This means that they work particularly well on wooden doors. Other Variations There is also a 32mm door stud available and this can be found in the related products.