This set of brass stud tacks is useful in a variety of applications: as a strike plate for one of our door knockers or hanging pulls, as a complement to other brass decoration, or as a spacer. Works great as an upholstery tack as well. One common application in Chinese woodworking is to decorate a front door to give it substance and weight. Door studs are commonly found on the doors of main entrances to palaces, temples and mansions. Their decorative features and quantity serve to indicate rank and importance during feudal society.