This pan set is made of professional high carbon steel which has high hardness, durability release and no deformation. Removable bottom & quick release latch - with a spring latch on the side, it is easy to open and close the detachable pan collar, easily take off your elaborate cake from the cake mold. It can be used alone or in combination as needed. Ideal for Cheesecake, Mousse, desserts, quiche and so on. Great baking cheesecake pans for baker and baking enthusiast.