Does the questioner want to ask "What is the composition of the Dior Presbyopia Postman bag lock?" Made of metal buckle. The lock of the genuine Dior bag uses a metal buckle, and the buckle locking structure is made of thick materials. Christian Dior, referred to as Dior, is a French high-end fashion brand holding company. Dior is owned by French fashion designer Christian Dior. It is headquartered in Paris and is affiliated with the Mo?t Hennessy-Louis Vuitton Group. The current president is Delphine Arnault.