LOCKT QuickShim is the first architectural-grade hinge with Twist-to-Shim collars. It makes fast work of installing and adjusting doors, and virtually eliminates the need to take a door down and rehang it. In fact, as doors sag and begin sticking, you can easily re-square them with a few twists of QuickShim’s shimming collars. Save time and money from the moment of install through the life of the door. Hang QuickShim.