The term prison cell or holing cell refers to the accommodation of a prisoner in a prison or police station. Prison cells generally are small, with three cement or brick walls and an open side secured with a steel plate, or more commonly steel bars and some type of door (swinging or sliding). There is usually only one door, which locks securely from the outside of the cell, to prevent escape. Prison cells are typically designed so that none of the fixtures or furnishings can be broken. This is accomplished by anchoring furniture to the walls or floor, as well as using stainless steel lavatories and commodes. This aids in preventing vandalism or the making of weapons.