About 9"-10" heavy gauge aluminum steel composition. With a release of a spring or clamp, the walls are expandable and the bottom removable. This allows cakes, tortes, or cheesecakes that might otherwise be difficult to remove from the pan to transfer out easily.
a two-piece round baking pan with an expandable side (secured by a clamp or spring) and a removable bottom
A round cake pan a little deeper than a standard cake pan. Springform pans have a clamp on the side which releases the sides from the bottom, leaving the cake intact. It's commonly used for cheesecake. Recipe: Almond Cheesecake With Peach Topping
A round cake pan with straight sides that come away from the cake separately. Often used for cheesecakes.
A round pan with tall, straight sides that can be removed by disengaging a series of metal clasps. Springform pans are most often used for cheesecakes, tortes and other delicate pastries that might tear or break if tipped or lifted out of a standard cake pan.
A two-part baking pan in which a spring-loaded collar fits around a base; the collar is removed after baking is complete. Used for foods that may be difficult to remove from regular pans, such as cheesecake.