The Vienna Adjustable Series of heavy duty professional hinges are designed to accommodate 3/8 to 1/2 inch (10 to 12 millimeter) glass. This hinges can carry a heavy load and allow doors up to 36" wide Available in both Wall Mount and Glass-to-Glass styles, it provides design flexibility. Vienna Adjustable Series Hinges are constructed of solid brass with all moving parts (pins and springs) in stainless steel. These hinges have two small allen screws which allow you to reset the door closed position. Two strategically placed pins inside the hinge provide template options, and satisfy two schools of thought for mounting shower door hinges. It allows the Vienna Hinge to be used with safety lock "mouse-ears" cut-out. On the other hand, to enable increased adjustability, the two pins can be removed which allows the Vienna Hinge to fit a rectangular shape, square cornered cut-out.