The Heavy Duty Vault Hinge Set Stainless Steel, for 3/4" Or 1" thick doors is used by all of the manufactures on their Solid Plastic (HDPE) Restroom dividers. The hinges are designed for 3/4" to 1" thick doors and 3/4" to 1" thick pilaster posts. They use this style hinge due to the incredible strength they have, for the heavy solid plastic doors. Also known as a Bathroom Stall Roller Bearing Hinge Set. Manufacture part # 7813. Shipped with mounting screws.