A Complete Guide to Glass Shower Door Hinges and How to Adjust Them Glass shower doors are a sleek and modern addition to any bathroom, but what really makes them functional (and beautiful) are their sturdy hinges. These small-but-mighty components are responsible for holding your door securely in place and ensuring smooth operation. If you've been wondering about glass shower door hinges—what they are, how they work, and how to adjust them—this guide has got you covered.