SHOWER HINGES - W TO G 90 DEGREE FIX Shower hinges are hardware devices that connect glass shower doors to walls or other glass panels. They allow the doors to open and close smoothly and securely. W to G 90 degree shower hinges are a specific type of shower hinges that attach a wall to a glass panel at a 90 degree angle. They are also known as wall to glass fixed clam 90 degree shower hinges.